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Lenovo A720 User's Manual

1. 1 Bluetooth module 5 Front function board 2 WLAN card 6 Converter board 3 Camera 7 Scalar board 4 Touch control board 8 Power switch board Chapter 7 Locating connectors controls and components 27 28 IdeaCentre A720Hardware Maintenance Manual Chapter 8 Replacing hardware Attention Do not remove the computer cover or attempt any repair before reading the Important safety information in the Safety and Warranty Guide that was included with your computer To obtain copies of the Safety and Warranty Guide go to the Support Web site at http consumersupport lenovo com Note Use only parts provided by Lenovo General information Pre disassembly instructions Before starting the disassembly procedure make sure that you do the following 1 Turn off the power to the system and all peripherals 2 Unplug all power and signal cables from the computer 3 Place the system on a flat stable surface Copyright Lenovo 2012 29 Replacing the keyboard and mouse Attention Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the keyboard and mouse Step 1 Step 2 Step 3 Step 4 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disco
2. ZZ Step 10 Remove the 5 screws that secure the scalar board to the middle frame and lift it up to remove it Step 9 Disconnect all the cables from the scalar board 51 Chapter 8 Replacing hardware Step 11 To install the new scalar board a Line up the holes on the new scalar board with the mounting holes on the middle frame and secure it with the 5 screws b Connect all the cables to the new scalar board c Reattach the scalar shielding to the middle frame with the 3 screws Step 12 Reattach the rear cover to the LED panel Step 13 Reattach the hinge to the chassis and reconnect the touch and LED panel cables back to the motherboard Step 14 Reattach the base cover and secure it with the screws Replacing the touch control board Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the touch control board Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base
3. Starting the Lenovo BIOS Setup Utility program To start the Lenovo BIOS Setup Utility program do the following 1 If your computer is already on when you start this procedure shut down the operating system and turn off the computer 2 Press and hold the F1 key then turn on the computer When the Lenovo BIOS Setup Utility program is displayed release the F1 key Note If a Power On Password or an Administrator Password has been set the Setup Utility program menu will not be displayed until you type your password For more information see Using passwords Viewing and changing settings System configuration options are listed in the Lenovo BIOS Setup Utility program menu To view or change settings see Starting the Setup Utility program You must use the keyboard when using the Lenovo BIOS Setup Utility menu The keys used to perform various tasks are displayed on the bottom of each screen Using passwords You can use the Lenovo BIOS Setup Utility program to set passwords to prevent unauthorized persons from gaining access to your computer and data See Starting the Setup Utility program The following types of passwords are available e Administrator Password e Power On Password You do not have to set any passwords to use your computer However if you decide to set passwords read the following sections Password considerations A password can be any combination of letters and numbers up to 16 charact
4. Step 13 Reattach the base cover and secure it with the screws Replacing the LED panel Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover Note It may be helpful to place the computer face down on a soft flat surface for this procedure Lenovo recommends that you use a blanket towel or other soft cloth to protect the computer screen from scratches or other damage To replace the LED panel Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 6 Remove the rear cover Refer to Removing the rear cover Chapter 8 Replacing hardware 59 Step 7 Remove the scalar board Refer to Replacing the scalar board Step 8 Remove the touch control board Refer to Replacing the touch control board Step 9 Remove the converter board Refer to Replacing the converter board Step
5. 1 From the Security menu select Set Power On Password and press the Enter key 2 The password dialog box will be displayed Type the current password and press the Enter key 3 To delete the Power On Password leave each new password line item blank then press Enter A Setup Notice confirming that changes have been saved will be displayed 4 Return to the Lenovo BIOS Setup Utility program menu and select the Exit option 5 Select Save changes and Exit from the menu Enabling or disabling a device The Devices options is used to enable or disable user access to the following devices USB Functions Select whether to enable or disable USB Universal Serial Bus functions If the functions are disabled no USB devices can be used SATA Mode When this feature is set to Disabled all devices connected to the SATA connectors e g hard disk drives or the optical disk drive are disabled and cannot be accessed Onboard Audio Controller Select whether to enable or disable the Onboard Audio Controller When this feature is set to Disabled all devices connected to the audio connectors e g headphones or a microphone are disabled and cannot be used Onboard Ethernet Controller or LAN Boot Agent Select whether to enable or disable the Onboard Ethernet Controller or select whether to enable or disable load onboard PXE Preboot Execution Environment To enable or disable a device do the following 1 Start the Setup Utility progra
6. Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Chapter 8 Replacing hardware 55 Step 6 Remove the rear cover Refer to Removing the rear cover Step 7 Use a small flat head screwdriver to prise the Bluetooth module away from the socket HE Step 8 Disconnect the cable from the Bluetooth module E Step 9 To install the new Bluetooth module a Connect the cable to the new Bluetooth module b Line up the new Bluetooth module with the socket snap it into position and secure it with the pins Step 10 Reattach the rear cover to the LED panel Step 11 Reattach the hinge to the chassis and reconnect the touch and LED panel cables to the motherboard Step 12 Reattach the base cover and secure it with the screws Replacing the WLAN card Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the WLAN card Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the
7. To avoid personal injury or equipment damage disconnect any attached power cords telecommunication cables network cables and modem cables before you open the computer covers unless instructed otherwise in the installation and configuration procedures Electrical safety Copyright Lenovo 2012 3 Observe the following rules when working on electrical equipment Important Use only approved tools and test equipment Some hand tools have handles covered with a soft material that does not insulate you when working with live electrical currents Many customers have rubber floor mats near their equipment that contain small conductive fibers to decrease electrostatic discharge e Find the room emergency power off EPO switch disconnecting switch or electrical outlet If an electrical accident occurs you can then operate the switch or unplug the power cord quickly Do not work alone under hazardous conditions or near equipment that has hazardous voltages e Disconnect all power before Performing a mechanical inspection Working near power supplies Removing or installing Field Replaceable Units FRUS Before you start to work on the computer unplug the power cord If you cannot unplug it ask the customer to power off the electrical outlet that supplies power to the machine and to lock the electrical outlet in the off position f you need to work on a computer that has exposed electrical circuits observe the follo
8. 10 Remove the power switch board Refer to Replacing the power switch board Step 11 Remove the Bluetooth module Refer to Replacing the Bluetooth module Step 12 Remove the WLAN card Refer to Replacing the WLAN card Step 13 Remove the WLAN antenna cable from the front bezel Step 14 Remove the camera Refer to Replacing the camera Step 15 Remove the front function board Refer to Replacing the front function board Step 16 Remove all the cables attached to the middle frame and the front bezel 60 IdeaCentre A720Hardware Maintenance Manual Step 17 Remove the 6 screws that secure the hinge to the middle frame and set the hinge aside Step 18 To install the new the LED panel a Line up the holes on the hinge with the mounting holes on the new middle frame and secure it with 6 screws b Attach all the cables to the new LED panel middle frame and front bezel Attach the WLAN card Bluetooth module power switch board converter board touch control board scalar board and front function board to the new LED panel middle frame and connect all the cables to the new LED panel Step 19 Reattach the rear cover to the LED panel Step 20 Reattach the hinge to the chassis and reconnect the touch and LED panel cables to the motherboard Step 21 Reattach the base cover and secure it with the screws FRU lists This chapter lists the information on the field replaceable units FRU
9. 1100400 25 200325 25008493 25 200326 Z H Bees ziz VRAM E T a e wes N ewaseecnon a N Cd Dwmoresw mmo oR zar news ooo EUREN Chapter 8 Replacing hardware 63 Power Supply FSP150 RAB 150W adapter Lieton PA 1151 11VA 150w adapter R A720 CoolMaster DIS 45W Heat Sink A720 AVC DIS 45W Heat Sink System fan A720 Delta DIS 45W Fan A720 AVC DIS 45W Fan WLAN card 16 A720 Wlan Card W CABLE A720 Wlan Anntena TV Tuner card 36 001876 36 001875 90200583 N 90201255 N 90200584 N 90201256 N 90000171 N 90200739 N Avermedia H339BB DVB T Mini TV Card Avermedia H339BA ATSC Mini TV Card DVB T ATSC Hybrid MC907 YUAN M270B Mini TV Card R AverMedia H339 ISDB T Mini TV Card DMB T HK Hybrid MC163M YUAN MC182A Analog mini TV Card A720 TV Tunner Cable For NTSL A720 TV Tunner Cable For PAL Remote control Philips Win7 IR 43KeyController R 888010661 1 Philips Win7 IR Reveiver R 888010662 1 Bluetooth module Fen BCM92070 BT2 1 EDR Flash DT Card 11200978 N 11200979 N USI BCM92070 BT2 1 EDR Flash DT Cara 9 A720 Bluetooth Card Cable 90200741 N Camera 20200089 N 1 Quanta H264 720P OV9712 CAM A720 Webcam Cable 90200740 Speakers A720 Speaker L R 90200743 Converter 30 A720 Converter A720 Converter Cable 64 IdeaCentre A720Hardware Maintenance Manual Touch control board eee control board Mason zr POT onpa Tee e xem N emeng Je
10. a plastic dental mirror This surface is conductive and touching a live circuit can cause personal injury and damage to the computer Do not service the following parts with the power on when they are removed from their normal operating positions in a computer Power supply units Pumps Blowers and fans Motor generators and similar units This practice ensures correct grounding of the units e f an electrical accident occurs Use caution do not become a victim yourself 4 IdeaCentre A720Hardware Maintenance Manual Switch off power Send another person to get medical aid Safety inspection guide The intent of this inspection guide is to assist you in identifying potential hazards posed by these products Each computer as it was designed and built had required safety items installed to protect users and service personnel from injury This guide addresses only those items However good judgment should be used to identify potential safety hazards due to attachment of features or options not covered by this inspection guide If any hazards are present you must determine how serious the apparent hazard could be and whether you can continue without first resolving the problem Consider the following items and the safety hazards they present e Electrical hazards especially primary power primary voltage on the frame can cause serious or fatal electrical shock e Explosive hazards such as a d
11. any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Disconnect the touch and LED panel cables from the connectors on the motherboard IB ol 3g E Step 6 Remove the 6 screws that secure the hinge to the chassis El then raise the hinge to remove it from the chassis H Step 7 To reattach the hinge to the chassis a Line up the hinge with the chassis and slide the hinge into position b Secure the hinge to the chassis with the 6 screws c Reconnect the touch and LED panel cables to the motherboard 48 IdeaCentre A720Hardware Maintenance Manual Step 8 Reattach the base cover and secure it with the screws Removing the rear cover Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To remove the rear cover Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the op
12. computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 6 Remove the rear cover Refer to Removing the rear cover Step 7 Use a small flat head screwdriver to prise the WLAN card away from the socket HA Step 8 Disconnect the antenna cable Efl and data cable from the WLAN card El 56 IdeaCentre A720Hardware Maintenance Manual Step 9 Lift up the WLAN card to remove it from the socket Step 10 To install the new WLAN card a Connect the data cable to the new WLAN card b Line up the new WLAN card with the socket snap it into position and secure it with the pins c Connect the antenna cable to the new WLAN card Step 11 Reattach the rear cover to the LED panel Step 12 Reattach the hinge to the chassis and reconnect the touch and LED panel cables to the motherboard Step 13 Reattach the base cover and secure it with the screws Replacing the camera Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace th
13. labeled facing up and press the battery into place b Insert the notched end of the TV Tuner card into the card port on the new motherboard and secure it with the 2 screws c Connect the antenna cable s to the TV Tuner card d Line up the new motherboard with the chassis and slide it into position Align the holes on the new motherboard with the mounting holes on the chassis and secure it to the chassis with the screws e Attach the optical drive eject board solid state disk optical drive CPU heat sink system fan memory module hard disk drive to the new motherboard f Connect all the cables to the new motherboard Step 20 Reattach the base cover and secure it with the screws Replacing the speaker system Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the speaker system Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hard disk drive
14. the Security menu select Set Administrator Password and press the Enter key 3 The password dialog box will be displayed Type the password then press the Enter key 4 Re type the password to confirm then press the Enter key If you typed the password correctly the password will be installed To change an Administrator Password do the following 1 Start the Lenovo BIOS Setup Utility program see Starting the Lenovo BIOS Setup Utility program on page 13 2 From the Security menu select Set Administrator Password and press the Enter key 3 The password dialog box will be displayed Type the current password then press the Enter key 4 Type the new password then press the Enter key Re type the password to confirm the new password If you typed the new password correctly the new password will be installed A Setup Noticed confirming that changes have been saved will be displayed To delete a previously set Administrator Password do the following 1 From the Security menu select Set Administrator Password and press the Enter key 2 The password dialog box will be displayed Type the current password and press the Enter key 3 To delete an Administrator Password leave each new password line item blank then press the Enter key A Setup Notice confirming that changes have been saved will be displayed 4 Return to the Lenovo BIOS Setup Utility program menu and select the Exit option 5 Select Save changes and Exit from the
15. 8 Lift the microprocessor straight up and out of the socket Eli Attention Do not touch the gold contacts on the bottom of the microprocessor When handling the microprocessor touch only the sides Note Do not drop anything onto the microprocessor socket while it is exposed The socket pins must be kept as clean as possible Step 9 Holding the sides of the microprocessor with your fingers remove the protective cover El that protects the gold contacts on the new microprocessor BH Step 10 Holding the sides of the microprocessor with your fingers position the microprocessor so that the notches on the microprocessor are aligned with the tabs in the microprocessor socket Important To avoid damaging the microprocessor contacts keep the microprocessor completely level while installing it into the socket Chapter 8 Replacing hardware 37 Step 11 Lower the microprocessor straight down into its socket on the motherboard Step 12 To secure the microprocessor in the socket close the microprocessor retainer and lock it into position with the small handle Step 13 Use a thermal grease syringe to place 5 drops of grease on the top of the microprocessor Each drop of grease should be 0 03ml 3 tick marks on the grease syringe Step 14 Reattach the system fan heat sink and base cover then secure them with the screws Replacing the optical drive Attention Turn off the computer and wait 3 to 5 minutes to let it co
16. Defaults from the menu Exiting the Lenovo BIOS Setup Utility program After you finish viewing or changing settings press the Esc key to return to the Lenovo BIOS Setup Utility program main menu You might have to press the Esc key several times Do one of the following e If you want to save the new settings select Save changes and Exit from the menu When the Save amp reset window shows select the Yes button and then press the Enter key to exit the Lenovo BIOS Setup Utility program e f you do not want to save the settings select Discard changes and Exit from the menu When the Reset Without Saving window shows select the Yes button and then press the Enter key to exit the Lenovo BIOS Setup Utility program Chapter 5 Using the Setup Utility 17 18 IdeaCentre A720Hardware Maintenance Manual Chapter 6 Symptom to FRU Index The Symptom to FRU index lists error symptoms and possible causes The most likely cause is listed first Always begin with Chapter 4 General Checkout on page 11 This index can also be used to help you decide which FRUs to have available when servicing a computer If you are unable to correct the problem using this index go to Undetermined problems on page 20 Notes f you have both an error message and an incorrect audio response diagnose the error message first f you cannot run the diagnostic tests or you get a diagnostic error code when running a test but did receive a P
17. Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Push out the latches on both sides of the memory socket to release the memory module Gently pull the memory module upward to remove it from its socket Step 6 Align the new memory module with the memory socket then insert it and push down on the top edge Make sure the latches lock the memory module in place Step 7 Reattach the base cover and secure it with the screws Replacing the system fan Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the system fan Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover 34 IdeaCentre A720Hardware Mainte
18. OST error message diagnose the POST error message first f you did not receive any error message look for a description of your error symptoms in the first part of this index Hard disk drive boot error A hard disk drive boot error can be caused by the following E FRA The startup drive is not included in the boot sequence Check the configuration and ensure the startup drive is configuration in the boot sequence No operating system is installed on the boot drive Install an operating system on the boot drive The boot sector on the startup drive is corrupted The drive must be formatted Do the following 1 Attempt to back up the data on the failing hard disk drive 2 Use the operating system to format the hard disk drive The drive is defective Replace the hard disk drive Power Supply Problems Follow these procedures if you suspect there is a power supply problem Check Verify FRU Action Check that the following are properly installed Reseat connectors Power Cord e On Off Switch connector e System Board Power Supply connectors Microprocessor connections Copyright Lenovo 2012 19 POST error codes Each time you turn the computer on it performs a series of tests to check that the system is operating correctly and that certain options are set This series of tests is called the Power On Self Test or POST POST does the following e Checks some basic motherboard operatio
19. Refer to Replacing the hard disk drive Step 6 Remove the heat sink Refer to Replacing the heat sink Step 7 Remove the optical drive Refer to Replacing the optical drive Step 8 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 9 Disconnect the speaker cable from the connectors on the motherboard Chapter 8 Replacing hardware 43 Step 10 Remove the 8 screws that secure the motherboard to the chassis and slide it out as shown j ab V Step 11 Remove the 4 screws that secure the speaker system to the motherboard Step 12 Detach the speaker from the chassis Step 13 To install the new speaker system a Attach the new speaker cable to the chassis b Line up the motherboard with the chassis and slide it into position Align the holes on the motherboard with the mounting holes on the chassis and secure it to the chassis with the 8 screws c Line up the new speaker system with the motherboard and secure it with the 4 screws d Connect the new speaker cable to the motherboard Step 14 Reattach the optical drive heat sink and hard disk drive to the motherboard Step 15 Reattach the hinge to the chassis and reconnect the touch and LED panel cables to the motherboard Step 16 Reattach the base cover and secure it with the screws 44 IdeaCentre A720Hardware Maintenance Manual Replacing the TV tuner card Note Turn off the computer and wait 3 to 5 minu
20. acing hardware 39 Replacing the solid state disk Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the solid state disk Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the 2 screws that secure the solid state disk to the motherboard Step 6 Pull the solid state disk upward to remove it from the card port Step 7 To install the new solid state disk a Insert the notched end of the new solid state disk into the card port on the motherboard b Secure the new solid state disk to the motherboard using the 2 screws Step 8 Reattach the base cover and secure it with the screws Replacing the optical drive eject board Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the optical drive eject board Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating
21. amaged CRT face or bulging capacitor e Mechanical hazards such as loose or missing hardware The guide consists of a series of steps presented as a checklist Begin the checks with the power off and the power cord disconnected Checklist 1 Check exterior covers for damage loose broken or sharp edges 2 Power off the computer Disconnect the power cord 3 Check the power cord for a A third wire ground connector in good condition Use a meter to measure third wire ground continuity for 0 1 ohm or less between the external ground pin and frame ground b The power cord should be the appropriate type as specified in the parts listings c Insulation must not be frayed or worn 4 Remove the cover 5 Check for any obvious alterations Use good judgment as to the safety of any alterations 6 Check inside the unit for any obvious hazards such as metal filings contamination water or other liquids or signs of fire or smoke damage 7 Check for worn frayed or pinched cables 8 Check that the power supply cover fasteners screws or rivets have not been removed or tampered with Handling electrostatic discharge sensitive devices Any computer part containing transistors or integrated circuits ICs should be considered sensitive to electrostatic discharge ESD ESD damage can occur when there is a difference in charge between objects Protect against ESD damage by equalizing the charge so that the computer the part the work
22. any action that would create a hazard for the customer or would make the computer unsafe e Before you start the computer ensure that other service representatives and customer personnel are not in a position that would create a hazard for them Place removed covers and other parts in a safe place away from all personnel while you are servicing the computer Keep your tool case away from areas that people may walk through to ensure no one trips over it Do not wear loose clothing that can be trapped in the moving parts of a machine Ensure that your sleeves are fastened or rolled up above your elbows If your hair is long tie or fasten it back nsert the ends of your necktie or scarf inside clothing or fasten it with a nonconductive clip approximately 8 centimeters 3 inches from the end Do not wear jewelry chains metal frame eyeglasses or metal fasteners for your clothing Remember Metal objects are good electrical conductors Wear safety glasses when you are hammering drilling soldering cutting wire attaching springs using solvents or working in any other conditions that might be hazardous to your eyes e After service reinstall all safety shields guards labels and ground wires Replace any safety device that is worn or defective Reattach all covers correctly before returning the computer to the customer CAUTION Electrical current from power telephone and communication cables can be hazardous
23. cover Step 5 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 6 Remove the rear cover Refer to Removing the rear cover Step 7 Disconnect all the touch cables from the touch control board Step 8 Remove the 2 screws that secure the touch control board to the middle frame Step 9 Lift up the touch control board to remove it Step 10 To install the new touch control board 52 IdeaCentre A720Hardware Maintenance Manual a Line up the holes on the new touch control board with the mounting holes on the middle frame and secure it with the 2 screws b Connect all the cables to the new touch control board Step 11 Reattach the rear cover to the LED panel Step 12 Reattach the hinge to the chassis and reconnect the touch and LED panel cables to the motherboard Step 13 Reattach the base cover and secure it with the screws Replacing the converter board Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the converter board Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left a
24. ctors controls and components of the computer Font view The following illustration shows the location of controls and components on the front of the computer Attention Be careful not to block any air vents on the computer Blocked air vents can cause overheating or EECH Om mp B 0 mp ai D CO amp d gr x X 4 Hard disk drive indicator 5 Bluetooth status indicator 6 WIFI status indicator Copyright Lenovo 2012 21 Left and right view The following illustration shows the location of connectors controls and components on the left and right side of the computer Attention Do not insert 3 inch discs into the optical drive 22 IdeaCentre A720Hardware Maintenance Manual Rear view The following illustration shows the location of connectors and components on the rear of the computer Jerome A H H in Cross E Chapter 7 Locating connectors controls and components 23 Hardware components The following illustration shows the components that make up your computer EC N w hb 1 System fan 17 Bluetooth module 2 Scalar board 18 Power switch board 3 Hard disk drive bracket 19 Front function board 4 Hard disk drive 20 Battery 5 Hard disk drive rubbers 21 Solid s
25. d a Insert the notched end of the TV Tuner card into the card port on the motherboard b Secure new the TV Tuner card to the motherboard with the 2 screws c Connect the antenna cable s to the new TV Tuner card Step 15 Line up motherboard with the chassis and slide it into position Align the holes on the motherboard with the mounting holes on the chassis and secure it to the chassis with the screws Step 16 Reattach the optical drive heat sink and hard disk drive to the motherboard Step 17 Reattach the hinge to the chassis and reconnect the touch and LED panel cables to the motherboard Step 18 Reconnect all the cables back to the motherboard Step 19 Reattach the base cover and secure it with the screws Replacing the battery Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the battery Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hard disk d
26. e EE 7206 Fenton T A720 3M MainFrame A720 3M MainFrame Stand sd Liteon SK 8861 e S Silk KB Silver WW Liteon SK 8861 s S Silk KB Silver WW LiteonSK 8861 Nordic S SilkKB Silver WW Liteon SK 8861 NL S Silk KB Silver WW LiteonSK 8861 EN FR S SilkKB Silver WW Liteon SK 8861 FR S Silk KB Silver WW Chapter 8 Replacing hardware 65 zi ziziziz Liteon Sk 8861 LA AR S SiIkKB Silver WW 90200569 Power cords DweiomCSAWenPowr Ce fooso EES 1 0M C5 JPN power cord with converter 31038887 line cord 31039655 3pin2pin converter 66 IdeaCentre A720Hardware Maintenance Manual Longwell Black Single end 1 0m SA C5Power Cable 31039105 Volex 1 0m C5 SA Power Cable 31049501 Mechanical A720 Base Cover W BCAS W TV2 W HDMI 90200744 A720 Base Cover W O BCAS W O TV2 W HDMI 90200745 A720 Base Cover W O BCAS W O TV2 W O HDMI 90200746 A720 Base Cover W O BCAS W O TV W HDMI 90200747 A720 Power Board 90000214 A720 LED Function Board 90000216 A720 Scalar Board 90000218 A720 PANEL BACK LIGHT CABLE 90200734 A720 Power Switch Cable 90200735 A720 LVDS Cable 90200736 A720 LED Function Board Cable 90200738 A720 MMB Cable 90200742 27 A720 Back Cover 90200751 28 A720 Rear Deco 90200754 A720 Scalar EMI Shielding 90201154 A720 Base Bottom Assy 90201155 Chapter 8 Replacing hardware 67 68 IdeaCentre A720Hardware Maintenance Manual Chapter 9 General information This chapter provides gene
27. e an alcohol pad to wipe the thermal grease off the heat sink and CPU Step 8 Use a thermal grease syringe to place 5 drops of grease on the top of the microprocessor Each drop of grease should be 0 03ml 8 tick marks on the grease syringe Step 9 Line up the new heat sink then secure it to the motherboard with the 9 screws Step 10 Attach the system fan to the new heat sink and secure it with the screws Step 11 Reattach the base cover and secure it with the screws Replacing the CPU Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the CPU Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the system fan Refer to Replacing the system fan Step 6 Remove the heat sink Refer to Replacing the heat sink Step 7 Use a flat head screwdriver to turn the CPU lock screw counterclockwise to unlock the CPU EIE 36 IdeaCentre A720Hardware Maintenance Manual Step
28. e camera Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 6 Remove the rear cover Refer to Removing the rear cover Step 7 Remove the 2 screws that secure the camera to the front bezel D Chapter 8 Replacing hardware 57 Step 8 Lift up the camera Efl and disconnect the data cable from the camera Ell Step 9 To install the new camera a Connect the data cable to the new camera b Line up the holes in the new camera with the mounting holes on the front bezel and secure it with the 2 screws Step 10 Reattach the rear cover to the LED panel Step 11 Reattach the hinge to the chassis and reconnect the touch and LED panel cables to the motherboard Step 12 Reattach the base cover and secure it with the screws Replacing the front function board Note Turn off the computer and wait 3 to 5 minutes to let it cool dow
29. en Sie unbedingt alle Hinweise vom Typ ACHTUNG oder VORSICHT in dieser Dokumentation bevor Sie irgendwelche Vorgange durchf hren Leggere le istruzioni introdotte da ATTENZIONE e PERICOLO presenti nel manuale prima di eseguire una qualsiasi delle istruzioni Certifique se de ler todas as instru es de cuidado e perigo neste manual antes de executar qualquer uma das instruc es Es importante que lea todas las declaraciones de precauci n y de peligro de este manual antes de seguir las instrucciones BUT EAT IN ZT TPT RB EC HP IPRC SE A fb N o PUT ETA BRE RAE PO ESAE Copyright Lenovo 2012 1 2 IdeaCentre A720Hardware Maintenance Manual Chapter 2 Safety information This chapter contains the safety information that you need to be familiar with before servicing a computer General safety Follow these rules to ensure general safety e Keep the areas around the computer clear and clean during and after maintenance When lifting any heavy object Ensure you can stand safely without slipping Distribute the weight of the object equally across both feet Lift slowly Never move suddenly or twist when you attempt to lift gt OO N A Lift by standing or by pushing up with your leg muscles this action removes the strain from the muscles in your back Do not attempt to lift any objects that weigh more than 16 kg 35 Ib or objects that you think are too heavy for you Do not perform
30. en lifting AA CAUTION The power control button on the device and the power switch on the power supply do not turn off the electrical current supplied to the device The device also might have more than one power cord To remove all electrical current from the device ensure that all power cords are disconnected from the power source AA AA 2 7 mp m 1 Klek A CAUTION Do not place any object weighing more than 82 kg 180 Ibs on top of rack mounted devices 8 IdeaCentre A720Hardware Maintenance Manual Chapter 3 General information This chapter provides general information that applies to all computer models covered by this manual Specifications This section lists the physical specifications for your computer This section lists the physical specifications for your computer Type IdeaCentre A720 This section lists the physical specifications Environment Air temperature Operating 10 to 35 C Transit 20 to 55 C Humidity Operating 35 to 80 Transit 20 to 90 40 C Altitude 86KPa to 106KPa Electrical input Input voltage 90V 264V AC Input frequency 47Hz 63Hz Copyright Lenovo 2012 9 10 IdeaCentre A720Hardware Maintenance Manual Chapter 4 General Checkout Attention The drives in the computer you are servicing might have been rearranged or the drive startup sequence may have been changed Be extremely careful during write operations such as copying saving o
31. er is required for operator safety and correct system function Proper grounding of the electrical outlet can be verified by a certified electrician Safety notices The CAUTION and DANGER safety notices in this section are provided in the the language of English AA DANGER Electrical current from power telephone and communication cables is hazardous To avoid a shock hazard Do not connect or disconnect any cables or perform installation maintenance or reconfiguration of this product during an electrical storm e Connect all power cords to a properly wired and grounded electrical outlet Connect any equipment that will be attached to this product to a properly wired outlet e When possible use one hand only to connect or disconnect signal cables Never turn on any equipment when there is evidence of fire water or structural damage Disconnect the attached power cords telecommunications cables network cables and modem cables before you open the device covers unless instructed otherwise in the installation and configuration procedures Connect and disconnect cables as described in the following table when installing moving or opening covers on this product or attached devices 6 IdeaCentre A720Hardware Maintenance Manual Turn everything OFF Turn everything OFF First attach all cables to devices First remove power cords from outlets Attach signal cables to connectors Remove signal cables fro
32. erating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 6 Raise the hinge Ell and slide the rear deco out as shown H Chapter 8 Replacing hardware 49 Step 7 Put the head of a flat head screwdriver between the middle frame and the rear cover as shown Then using the screwdriver as a lever and the middle frame metal bar as the fulcrum prise the rear cover away from the middle frame ae Step 8 Working around the edge in an anti clockwise direction use your fingers to prise up the rear cover The rear cover is pinned into place use short sharp movements to prise it up Eli Step 9 Press down the hinge and slide out the rear cover Step 10 To reattach the rear cover a Raise the hinge line up the rear cover with the LED panel and slide it back into position b Press the edge of rear cover to lock the cover to the LED panel wi
33. ers a z and 0 9 For security reasons it is a good idea to use a strong password that cannot be easily compromised We suggest that passwords should follow these rules e For astrong password use 7 16 characters and a mix of letters and numbers e Do not use your name or your user name e Do not use a common word or a common name Use something significantly different from your previous password Attention Administrator and Power On passwords are not case sensitive Copyright Lenovo 2012 13 Administrator Password Setting an Administrator Password deters unauthorized persons from changing configuration settings You might want to set an Administrator Password if you are responsible for maintaining the settings of several computers After you set an Administrator Password a password prompt is displayed every time you access the Lenovo BIOS Setup Utility program If both the Administrator and Power On Password are set you can type either password However you must use your Administrator Password to change any configuration settings Setting changing or deleting an Administrator password To set an Administrator Password do the following Note A password can be any combination of letters and numbers up to 16 characters a z and 0 9 For more information see Password considerations on page 13 1 Start the Lenovo BIOS Setup Utility program see Starting the Lenovo BIOS Setup Utility program on page 13 2 From
34. lenovo IdeaCentre A720 Hardware Maintenance Manual ideaideaideaCentreidea lenovo IdeaCentre A720 Hardware Maintenance Manual Contents Chapter 1 About this manual Important Safety Information Chapter 2 Safety information General safety Electrical safety Safety inspection guide Handling electrostatic discharge sensitive devices Grounding requirements Safety notices Chapter 3 General information Specifications Chapter 4 General Checkout Chapter 5 Using the Setup Utility Starting the Lenovo BIOS Setup Utility program Viewing and changing settings Using passwords Enabling or disabling a device Selecting a startup device Exiting the Lenovo BIOS Setup Utility program Chapter 6 Symptom to FRU Index Hard disk drive boot error Power Supply Problems POST error codes Undetermined problems Chapter 7 Locating connectors controls and components Chapter 8 Replacing hardware Copyright Lenovo 2012 aw wo 0 OOA o 11 13 13 13 13 15 16 17 19 19 19 20 20 21 29 General information Ser ETES Replacing the keyboard and mouse Replacing the power cord or power adapter Removing the base cover Replacing the hard disk drive Replacing a memory module Replacing the system fan Replacing the heat sink Replacing the CPU Replacing the optical drive Replacing the solid state disk Replacing the
35. m see Starting the Setup Utility program on page 13 2 From the Setup Utility program menu select Devices 3 Select an option as follows Select USB Setup press the Enter key then select USB Functions Chapter 5 Using the Setup Utility 15 Select ATA Device Setup press the Enter key then select SATA Mode Select Audio Setup press the Enter key then select Onboard Audio Controller Select Network Setup press the Enter key then select Onboard Ethernet Support or LAN Boot Agent 4 Select Disabled or Enabled and press the Enter key 5 Return to the Lenovo BIOS Setup Utility program menu and select the Exit option 6 Select Save changes and Exit from the menu Notes a If you do not want to save the settings select Discard changes and Exit from the menu b Select IDE AHCI Mode Device driver support is required for ACHI Depending on how the hard disk image was installed changing this setting may prevent the system from booting Selecting a startup device If your computer does not boot from a device such as the CD DVD ROM drive disk or hard disk as expected follow one of the procedures below Selecting a temporary startup device Use this procedure to start up from any boot device Note Not all CDs DVDs or hard disk drives are bootable 1 Turn off your computer 2 Press and hold the F12 key then turn on the computer When the Startup Device Menu appears release the F12 key Note If the S
36. m connectors Attach power cords to outlet Remove all cables from devices Turn device ON CAUTION When replacing the lithium battery use only Part Number 45C1566 or an equivalent type battery recommended by the manufacturer If your system has a module containing a lithium battery replace it only with the same module type made by the same manufacturer The battery contains lithium and can explode if not properly used handled or disposed of Do not Throw into or immerse in water Heat to more than 100 C 212 F Repair or disassemble Dispose of the battery as required by local ordinances or regulations A CAUTION When laser products such as CD ROMs DVD ROM drives fiber optic devices or transmitters are installed note the following Do not remove the covers Removing the covers of the laser product could result in exposure to hazardous laser radiation There are no serviceable parts inside the device Use of controls or adjustments or performance of procedures other than those specified herein might result in hazardous radiation exposure Awer Some laser products contain an embedded Class 3A or Class 3B laser diode Note the following These diodes emit radiation when open Do not stare into the beam do not view directly with optical instruments and avoid direct exposure to the beam Chapter 2 Safety information 7 218 kg 37 Ibs 232 kg 70 5 Ibs CAUTION Use safe practices wh
37. mat and the person handling the part are all at the same charge Notes 1 Use product specific ESD procedures when they exceed the requirements noted here 2 Make sure that the ESD protective devices you use have been certified ISO 9000 as fully effective When handling ESD sensitive parts Chapter 2 Safety information 5 e Keep the parts in protective packages until they are inserted into the product e Avoid contact with other people while handling the part e Wear a grounded wrist strap against your skin to eliminate static on your body e Prevent the part from touching your clothing Most clothing is insulative and retains a charge even when you are wearing a wrist strap e Use the black side of a grounded work mat to provide a static free work surface The mat is especially useful when handling ESD sensitive devices e Select a grounding system such as those listed below to provide protection that meets the specific service requirement Note The use of a grounding system is desirable but not required to protect against ESD damage Attach the ESD ground clip to any frame ground ground braid or green wire ground Use an ESD common ground or reference point when working on a double insulated or battery operated system You can use coax or connector outside shells on these systems Use the round ground prong of the AC plug on AC operated computers Grounding requirements Electrical grounding of the comput
38. menu Power On Password When a Power On Password is set you cannot start the Lenovo BIOS Setup Utility program until a valid password is typed from the keyboard Setting changing or deleting a Power On Password Note A password can be any combination of letters and numbers up to 16 characters a z and 0 9 14 IdeaCentre A720Hardware Maintenance Manual To set a Power On Password do the following 1 Start the Lenovo BIOS Setup Utility program See Starting the Lenovo BIOS Setup Utility program on page 13 2 From the Security menu select Set Power On Password and press the Enter key 3 The password dialog box will be displayed Type the password then press the Enter key 4 Re type the password to confirm If you typed the password correctly the password will be installed To change a Power On Password do the following 1 Start the Lenovo BIOS Setup Utility program See Starting the Lenovo BIOS Setup Utility program on page 13 2 From the Security menu select Set Power On Password and press the Enter key 3 The password dialog box will be displayed Type the current password then press the Enter key 4 Type the new password then press the Enter key Re type the password to confirm the new password If you typed the new password correctly the new password will be installed A Setup Noticed confirming that changes have been saved will be displayed To delete a previously set Power On Password do the following
39. n before removing the cover To replace the front function board Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 6 Remove the rear cover Refer to Removing the rear cover Step 7 Remove the 2 screws that secure the front function board to the front bezel Step 8 Disconnect the data cable from the front function board BH 58 IdeaCentre A720Hardware Maintenance Manual Step 9 Lift up the front function board to remove it from the front bezel Eli Step 10 To install the new front function board a Connect the data cable to the new front function board b Line up the holes in the new front function board with the mounting holes on the front bezel and secure it with the 2 screws Step 11 Reattach the rear cover to the LED panel Step 12 Reattach the hinge to the chassis and reconnect the touch and LED panel cables to the motherboard
40. nance Manual Step 5 Remove the 3 screws that secure the system fan to the heat sink Step 6 Disconnect the power cable from the motherboard H Step 7 Lift the system fan up to remove it EJ Step 8 Line up the new system fan then secure it to the heat sink and connect the new power cable to the motherboard Step 9 Reattach the base cover and secure it with the screws Replacing the heat sink Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the heat sink Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the system fan Refer to Replacing the system fan Step 6 Remove the 9 screws that secure the heat sink to the motherboard Chapter 8 Replacing hardware 35 Step 7 Remove the heat sink by lifting it up ep Attention Place the heat sink upside down on a flat surface to prevent thermal grease from contaminating other components Attention Us
41. nd right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 6 Remove the rear cover Refer to Removing the rear cover Step 7 Remove the 4 screws that secure the converter board to the middle frame Step 8 Disconnect the 2 cables from the converter board H Step 9 Lift up the converter board to remove it Chapter 8 Replacing hardware 53 Step 10 To install the new converter board a Line up the holes on the new converter board with the mounting holes on the middle frame and secure it with the 4 screws b Connect the 2 cables to the new converter board Step 11 Reattach the rear cover to the LED panel Step 12 Reattach the hinge to the chassis and reconnect the touch and LED panel cables to the motherboard Step 13 Reattach the base cover and secure it with the screws Replacing the power switch board Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the power switch board Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This incl
42. nnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors lt lt Note Your keyboard will be connected to a USB connector on one side or at the rear of the computer Disconnect the defective keyboard cable from the computer and connect the new keyboard cable to the same connector Note The mouse can be replaced using the same method Replacing the power cord or power adapter Attention Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the power cord and power adapter Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices 30 IdeaCentre A720Hardware Maintenance Manual Step 2 Locate the connector for the power cord Refer to Rear view Step 3 Disconnect the failing power cord and adapter from the computer and connect the new power cord and adapter to the same connector Removing the base cover Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover Note It may be helpful to place the computer face down on a soft flat surface for this procedure Lenovo recommends that you use a blanket towel o
43. ns Checks that the memory is working correctly e Starts video operations e Verifies that the boot drive is working POST Error Message Description Action Keyboard error Cannot initialize the keyboard Make sure the keyboard is properly connected to the computer and that no keys are held pressed during POST To purposely configure the computer without a keyboard select Keyboardless operation in Startup and set the option to Enabled The BIOS then ignores the missing keyboard during POST Reboot and Select proper Boot device or Insert Boot The BIOS was unable to find a suitable boot device Make Media in selected Boot device sure the boot drive is properly connected to the computer Make sure you have bootable media in the boot device Undetermined problems 1 Power off the computer 2 Remove or disconnect the following components if connected or installed one at a time a o 8o f External devices modem printer or mouse Extended video memory External Cache External Cache RAM Hard disk drive Disk drive 3 Power on the computer to re test the system 4 Repeat steps 1 through 3 until you find the failing device or component If all devices and components have been removed and the problem continues replace the system board 20 IdeaCentre A720Hardware Maintenance Manual Chapter 7 Locating connectors controls and components This section provides illustrations to help locate the various conne
44. ol down before removing the cover To replace the optical drive Step 1 Step 2 Step 3 Step 4 Step 5 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all power cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover Disconnect the optical drive data cable from the motherboard 38 IdeaCentre A720Hardware Maintenance Manual Step 6 Remove the 3 screws that secure the optical drive to the motherboard and lift it up to remove it Step 7 Remove the 5 screws that secure the optical drive to the bracket and disconnect the data cable from the optical drive Step 8 Step 9 Install the new optical drive as follows a b C d Connect the data cable to the new optical drive Align the new optical drive with the bracket push it into position and secure it with the 5 screws Line up the optical drive bracket holes with the mounting holes in the motherboard and secure it with the 3 screws Connect the data cable to the motherboard Reattach the base cover and secure it with the screws Chapter 8 Repl
45. optical drive eject board Replacing the motherboard Replacing the speaker system Replacing the TV tuner card Replacing the battery Removing the hinge from the ES Removing the rear cover Replacing the scalar board Replacing the touch control board Replacing the converter board Replacing the power switch board Replacing the Bluetooth module Replacing the WLAN card Replacing the camera Replacing the front function board Replacing the LED panel FRU lists Chapter 9 General information Additional Service Information 29 30 30 31 32 34 34 35 36 38 40 40 41 43 45 46 47 49 50 52 53 54 55 56 57 58 59 61 69 69 iV IdeaCentre A720Hardware Maintenance Manual Chapter 1 About this manual This manual contains service and reference information for IdeaCentre A720 computers listed on the cover It is intended only for trained servicers who are familiar with Lenovo computer products Before servicing a Lenovo product be sure to read the Safety Information The description of the TV tuner card in this manual applies only to computers with a TV tuner card installed It does not apply to computers without a TV tuner card Important Safety Information Be sure to read all CAUTION and DANGER sections in this manual before following any of the instructions Veuillez lire toutes les consignes de type DANGER et ATTENTION du pr sent document avant d ex cuter les instructions Les
46. r formatting Data or programs can be overwritten if you select an incorrect drive General error messages appear if a problem or conflict is found by an application the operating system or both For an explanation of these messages refer to the information supplied with that software package Use the following procedure to help determine the cause of the problem Power off the computer and all external devices Check all cables and power cords Set all display controls to the middle position Power on all external devices ar Go N A Power on the computer e Look for displayed error codes e Look for readable instructions or a main menu on the display If you did not receive the correct response proceed to step 6 If you did receive the correct response proceed to step 7 6 If one of the following happens follow the instruction given e lf the computer displays a POST error go to POST error codes e f the computer hangs and no error is displayed continue at step 7 7 If the test stops and you cannot continue replace the last device tested Copyright Lenovo 2012 11 12 IdeaCentre A720Hardware Maintenance Manual Chapter 5 Using the Setup Utility The Setup Utility program is used to view and change the configuration settings of your computer regardless of which operating system you are using However the operating system settings might override any similar settings in the Setup Utility program
47. r other soft cloth to protect the computer screen from scratches or other damage To remove the base cover Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Place the computer face down on a soft flat surface then remove the 7 screws that secure the base cover to the base Chapter 8 Replacing hardware 31 Step 5 om 25 Step 6 To reattach the base cover a Line up the base cover with the base slide it back and snap it into position b Place the computer face down on a soft flat surface then secure the base cover to the base with the 7 screws Replacing the hard disk drive Attention Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the hard disk drive Step 1 Step 2 Step 3 Step 4 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Unplug all po
48. ral information that applies to all computer models covered by this manual Additional Service Information This chapter provides additional information that the service representative might find helpful Power management Power management reduces the power consumption of certain components of the computer such as the system power supply processor hard disk drives and some monitors Advanced configuration and power interface ACPI BIOS As this computer has an ACPI BIOS system the operating system is allowed to control the power management features of the computer and the settings for Advanced Power Management APM BIOS mode is ignored Not all operating systems support ACPI BIOS mode Automatic Power On features The Automatic Power On features within the Power Management menu allow you to enable and disable features that turn on the computer automatically e Wake Up on Alarm You can specify a date and time at which the computer will be turned on automatically This can be either a single event a daily event or a weekly event e Wake Up on LAN This feature allows LAN adapter card to wake the System Copyright Lenovo 2012 69
49. rive Refer to Replacing the hard disk drive Step 6 Remove the heat sink Refer to Replacing the heat sink Step 7 Remove the optical drive Refer to Replacing the optical drive Step 8 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 9 Remove all the cables connected to the motherboard 46 IdeaCentre A720Hardware Maintenance Manual Step 10 Remove the 8 screws that secure the motherboard to the chassis and slide it out as shown e A dei W oi Sec KS e oan Step 12 To install the new battery a Insert the new battery CR2032 into the socket with the side labeled facing up and press the battery into place Step 13 Line up the motherboard with the chassis and slide it into position Align the holes on the motherboard with the mounting holes on the chassis and secure it to the chassis with the screws Step 14 Reattach the optical drive heat sink and hard disk drive to the motherboard Step 15 Reattach the hinge to the chassis and reconnect the touch and LED panel cables to the motherboard Step 16 Reconnect all the cables back to the motherboard Step 17 Reattach the base cover and secure it with the screws Removing the hinge from the chassis Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To remove the hinge from the chassis Chapter 8 Replacing hardware 47 Step 1 Remove
50. s Attention Be sure to read and understand all the safety information before replacing any FRUs Notes FRUs that have a 1 or 2 in the CRU column are Customer Replaceable Units CRUs e 1 identifies parts that are fairly simple to replace requiring few or no tools e 2 identifies parts that are slightly more difficult to replace e N identifies parts that are not to be replaced by the customer Chapter 8 Replacing hardware 61 pre pey N w Motherboard A720 1G_DDR3 W HDIN W TV1 MB 90000165 In Loes Jee Jk waiecowwrowwowws Jee Jk waze ooro WHO WOT MB Jee Jk onsereen Jens EELER Pet Pr Te Chest tone v Ee EE umen w ita 0210 286 Law zerea Broess wemewr Ju a 06204266 L oM 20PGA Paces emen v Eenzege Jesse Is ureegen Jee Is KEE KEE Ia 7 9700N 236 ET are Jess Is SEET EE DEENEN z z iz iziziziziziz 62 IdeaCentre A720Hardware Maintenance Manual MT16KTF51264HZ 1G6M1 1 100232 WD WD10JPVT 24A1YTO 5400PRM 9 5mm 1T HDD 16200071 Solid state disk Samsung MZMPA064HMDR 64G mSATA SSD 16 005084 Samsung PM830 16200109 T Optical disk drive HLDS CA30N BD Combo LH BE PLDS DL 4ETS 12 7mm Slim SATA Slot load BD Combo PLDS DC 6E2SH BD Combo LH BE SONY Optiarc AD 7800 Slot Rambo 25 203881 HLDS GA31N Slim SATA Slot DVDRW 25 009580 A720 ODD Cable 90200732 IN A720 ODD EJECT BOARD 90000217 IN m A720 ODD Bracket 90200752 IN N13P GL AIO A1 GT630M
51. system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the 2 screws that secure the optical drive eject board to the motherboard 40 IdeaCentre A720Hardware Maintenance Manual Step 6 Lift up the optical drive eject board to remove it Step 7 To install the new optical drive eject board a Connect the new optical drive eject board to the motherboard b Secure the new optical drive eject board to the motherboard with the 2 screws Step 8 Reattach the base cover and secure it with the screws Replacing the motherboard Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the motherboard Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer
52. tartup Device Menu does not display using these steps repeatedly press and release the F12 key rather than keeping it pressed when turning on the computer Use ft and arrows to select the desired startup device from the Startup Device Menu and press the Enter key to begin Note Selecting a startup device from the Startup Device Menu does not permanently change the startup sequence Selecting or changing the startup device sequence To view or permanently change the configured startup device sequence do the following 1 Start the Lenovo BIOS Setup Utility program see Starting the Lenovo BIOS Setup Utility program on page 13 2 From the Lenovo BIOS Setup Utility program main menu select the Startup option 3 Press the Enter key and select the devices for the Primary Boot Sequence Read the information displayed on the right side of the screen Use and Warrows to select a device Use the lt gt or lt gt keys to move a device up or down Use the x key to exclude the device from or include the device in the boot sequence Return to the Lenovo BIOS Setup Utility program menu and select the Exit option 6 Select Save changes and Exit from the menu 16 Notes IdeaCentre A720Hardware Maintenance Manual a If you do not want to save the settings select Discard changes and Exit from the menu b If you have changed these settings and want to return to the default settings select Load Optimal
53. tate disk 22 TV tuner card 23 Glass 24 Panel frame 24 IdeaCentre A720Hardware Maintenance Manual Identifying parts on the motherboard The motherboard sometimes called the planar or system board is the main circuit board in your computer It provides basic computing functions and supports a variety of devices that are factory installed or that you can install later The following illustration shows the location of connectors and components on the front of the motherboard ool lool D 22 E Ab m 1 HDMI out connector 12 TV jack 2 Japan only 4 Ethernet connector RJ45 6 System fan connector 7 Scalar cable connector 8 Scalar cable connector INIT Chapter 7 Locating connectors controls and components 25 The following illustration shows the location of connectors and components on the back of the motherboard 23 TV Tuner card connector 24 Battery 26 IdeaCentre A720Hardware Maintenance Manual Identifying parts on the back of the LED panel The following illustration shows the components and controls on the back of LED panel
54. tes to let it cool down before removing the cover To replace the TV tuner card Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hard disk drive Refer to Replacing the hard disk drive Step 6 Remove the heat sink Refer to Replacing the heat sink Step 7 Remove the optical drive Refer to Replacing the optical drive Step 8 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 9 Remove all the cables connected to the motherboard Step 10 Remove the 8 screws that secure the motherboard to the chassis and slide it out as shown j Y Step 11 Remove the 2 screws that secure the TV Tuner card to the motherboard Step 12 Disconnect the antenna cable s from the TV Tuner card Chapter 8 Replacing hardware 45 Step 13 Pull the TV Tuner card upward to remove it from the card port on the motherboard Step 14 To install the new TV Tuner car
55. th the pins c Slide the rear deco back into position Step 11 Reattach the hinge to the chassis and reconnect the touch and LED panel cables back to the motherboard Step 12 Reattach the base cover and secure it with the screws Replacing the scalar board Note Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the scalar board Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3 Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 6 Remove the rear cover Refer to Removing the rear cover Step 7 Remove the 3 screws that secure the scalar shielding to the middle frame 50 IdeaCentre A720Hardware Maintenance Manual Step 8 Remove the scalar shielding and set it aside Touch control Power Bluetooth Scalar Q HDMI DVI LED CIR LVDS MMB o 9 i 9 E o gt 9 o e MEN M VA e 7 wh
56. to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hard disk drive Refer to Replacing the hard disk drive Step 6 Remove a memory module Refer to Replacing a memory module Step 7 Remove the system fan Refer to Replacing the system fan Step 8 Remove the heat sink Refer to Replacing the heat sink Step 9 Remove the CPU Refer to Replacing the CPU Step 10 Remove the optical drive Refer to Replacing the optical drive Step 11 Remove the solid state disk Refer to Replacing the solid state disk Step 12 Remove the optical drive eject board Refer to Replacing the optical drive eject board Step 13 Remove all the cables connected to the motherboard Chapter 8 Replacing hardware 41 Step 14 Remove the 8 screws that secure the motherboard to the chassis and slide it out as shown j ab V Step 15 Remove the 2 screws that secure the TV Tuner card to the motherboard Step 16 Disconnect the antenna cable s from the TV Tuner card Step 17 Pull the TV Tuner card upward to remove it from the card port 42 IdeaCentre A720Hardware Maintenance Manual Step 18 Use a flat head screwdriver as a lever to prise out the battery as shown N m yr m J EI GR Xe Step 19 To install the new motherboard a Insert the battery CR2032 into the socket with the side
57. udes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Step 4 Remove the base cover Refer to Removing the base cover Step 5 Remove the hinge from the chassis Refer to Removing the hinge from the chassis Step 6 Remove the rear cover Refer to Removing the rear cover Step 7 Disconnect the power cable from the power switch board 54 IdeaCentre A720Hardware Maintenance Manual Step 8 Remove the screw that secures the power switch board to the LED panel and lift up the power switch board to remove it Step 9 To install the power switch board a Line up the hole on the new power switch board with the mounting hole on the LED panel and secure it with the screw b Connect the power cable to the new converter board Step 10 Reattach the rear cover to the LED panel Step 11 Reattach the hinge to the chassis and reconnect the touch and LED panel cables to the motherboard Step 12 Reattach the base cover and secure it with the screws Replacing the Bluetooth module Attention Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace the Bluetooth module Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices
58. wer cords from electrical outlets Disconnect all cables attached to the computer This includes power cords input output I O cables and any other cables that are connected to the computer Refer to Left and right view and Rear view for help with locating the various connectors Remove the base cover Refer to Removing the base cover 32 IdeaCentre A720Hardware Maintenance Manual Step 5 Remove the 2 screws that secure the hard disk drive to the motherboard D Step 6 Disconnect the data and power cable from the hard disk drive H Step 8 Detach the rubbers from the hard disk drive as shown Step 9 Install the new hard disk drive as follows a Attach the rubbers to the new hard disk drive b Line up the new hard disk drive and slide it back into the hard disk drive bay Chapter 8 Replacing hardware 33 c Secure the new hard disk drive to motherboard with the 2 screws d Connect the data and power cable to the new hard disk drive and motherboard Step 10 Reattach the base cover and secure it with the screws Replacing a memory module Attention Turn off the computer and wait 3 to 5 minutes to let it cool down before removing the cover To replace a memory module Step 1 Remove any media disks CDs DVDs or memory cards from the drives shut down the operating system and turn off the computer and all attached devices Step 2 Unplug all power cords from electrical outlets Step 3
59. wing precautions Ensure that another person familiar with the power off controls is near you Remember Another person must be there to switch off the power if necessary Use only one hand when working with powered on electrical equipment keep the other hand in your pocket or behind your back Remember There must be a complete circuit to cause electrical shock By observing the above rule you may prevent a current from passing through your body When using a tester set the controls correctly and use the approved probe leads and accessories for that tester Stand on suitable rubber mats obtained locally if necessary to insulate you from grounds such as metal floor strips and machine frames Observe the special safety precautions when you work with very high voltages these instructions are in the safety sections of the maintenance information Use extreme care when measuring high voltages e Regularly inspect and maintain your electrical hand tools to ensure they are safe to use Do not use worn or broken tools and testers Never assume that power has been disconnected from a circuit First check that it has been powered off e Always look carefully for possible hazards in your work area Examples of these hazards are wet floors non grounded power extension cables conditions that may cause or allow power surges and missing safety grounds Do not touch live electrical circuits with the reflective surface of

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