Troubleshooting Guide - Blog A
Contents
1. 2 If the external window area is damaged replace the Front Housing LCM TP Assembly Check Inspect the video camera on the main PBA and the Rubber PL Sensor on the Front Housing LCM TP Assembly Action 1 H dirty or clogged clean them 2 If the Rubber PL Sensor is damaged replace it 3 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 23 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 11 Flash LED 1 11 1 Flash LED not flashing Check Inspect the external area of the flash LED window Action 1 If the flash LED window is dirty clean it 2 If the flash LED window scratched or damaged replace the Middle Frame Assembly Check Inspect the flash LED on the main PBA Action 1 If dirty or clogged clean it 2 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 24 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 12 Bluetooth and WLAN 1 12 1 Bluetooth or WLAN connection failure Check Inspect the Antenna BT WIFI on the Middle Frame Assembly Action 1 If dirty clean it Check Inspect the contact pads on the Antenna BT WIFI and the contact pins on the main PBA Action 1 If dirty or oxidized clean the pads and pins 2 If defective or damaged replace the Middle Frame Assembly 3 If the pins are damage2. ccccccesseeeeeeneeeesseeeseoeseeesseenseoeeeeeaseonseoeseeeasens 28 1 16 AMBIENT Bt ut E 29 1 16 1 Ambient Light Sensor E 29 n Kai PROXIMITY SWC EE 30 TAZI Get d la EC a T 30 1218 Real Time eegene Ee 31 1 18 1 Real Time Clock test fails ssssssssssssssss sese eess neee neeaae eenn 31 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 2 48 SONY make believe Troubleshooting Guide mech eS TOU UR dl TE 32 1 19 1 Total call time CC E 32 1 20 External Memory Sieger gegen ess esse esse eenn nenen eenn 33 1 20 1 Memory Card not detected ccccccesseeceseescenseseesseesenseesenseesenseesensesees 33 Ra Ee TAT 34 Ba N Security i CU 34 T2 FM Rad BEE 35 1 22 1 No Poor FM Radio reception sssssssssssssssssssssssss esse esse REENEN REESEN REESEN 35 1 23 lt T Ehe 36 1 23 1 Battery Test e UC 36 t24 Verily R lt ne T 37 1 24 1 Verify certificates Tale eege 37 LZS NFO TESI rn E A 38 EWEN CU 38 120 RA EEN WCS T 39 1 26 1 RX Diversity Test TANS sssssssssssssssss esse seene enesenn ennenen enen eenn 39 1 27 Network Ee TI 40 Bes INO POOP SIQIAN cscsiesecnensaseteansasecscoessedasancenvenransauessvesaxeosexcccssosasecacnasseteescnseees 40 El Mee 42 T29 F SIM NOU COTO CLS E 42 1 28 2 Incorrect SIM Card adapter cccccsscccsseeccesseesesseesenneesenseesensessensesees 43 1 26 3 INCOFFECT SIM indicated H 43 T29 A UNG U 44 1 29 1 Battery will not Gates eege Ee es 44 TSO Hands Free
3. Inspect the ambient light sensor on the main PBA and the Rubber PL Sensor on the Front Housing LCM TP Assembly Action 1 If dirty or clogged clean them 2 If the Rubber PL Sensor is damaged replace it 3 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 29 48 SONY make believe Troubleshooting Guide mech 1 17 Proximity Switch 1 17 1 Proximity Switch Check Inspect the external area of the proximity switch window Action 1 If dirty clean it 2 If the external window area is damaged replace the Front Housing LCM TP Assembly Check Inspect the proximity switch sensor on the main PBA and the Rubber PL Sensor on the Front Housing LCM TP Assembly Action 1 If dirty or clogged clean them 2 If the Rubber PL Sensor is damaged replace it 3 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 30 48 SONY make believe Troubleshooting Guide mech 1 18 Real Time Clock 1 18 1 Real Time Clock test fails Action Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 31 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 19 Total call time 1 19 1 Total call time fails Action Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 32 48 SONY make believe Troubleshooting Guide mech Pr
4. Action 1 If not properly connected disconnect and reconnect 2 If dirty or oxidized clean it 3 If the pads or the BtB connector of the Sub PBA Assembly is damaged replace the Sub PBA Assembly 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 15 48 SONY make believe Troubleshooting Guide mech Problem Areas 3 If the Side key FPC is defective replace the Front Housing LCM TP Assembly 4 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 16 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 7 Earphone 1 7 1 Earphone Check Inspect the Receiver s external port on the Front Housing LCM TP Assembly Action 1 If clogged clean it 2 If the port is damaged replace the Front Housing LCM TP Assembly Check Inspect the Receiver s pins and the contact pins on the main PBA Action 1 If dirty clean them 2 If the pins of the Receiver are damaged replace the Receiver 3 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 17 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 8 Microphone 1 8 1 Main Microphone Check Inspect the Microphone s external port on the Front Housing LCM TP Assembly Action If clogged clean the port Check Inspect the Rubber hole locating direction for Main MIC
5. Sony Mobile Communications AB Company Internal 7 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 2 4 Camera Key Check Inspect the external area of the Camera key Action lf dirty clean it Check Inspect the Camera key Dome Action 1 If dirty or oxidized clean it 2 If the Camera key is damaged replace the Battery Cover Check Inspect the Camera key dome on Side FPC Action 1 If dirty or oxidized clean it 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 8 48 SONY make believe Troubleshooting Guide mech Problem Areas Check Inspect the BtB connector on Side FPC to Main PBA 1 If not properly connected disconnect and reconnect 2 If the Side FPC is defective replace the Front Housing LCM TP Assembly 3 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 9 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 3 Touch Screen 1 3 1 Touch Screen malfunction Check Inspect the touch screen on the Front Housing LCM TP Assembly Action If dirty clean it If The end user has complained about unexpected behavior of the touch screen or the touch keys Action Check Inspect the BtB connector of the Front Cover Display Assembly to the main PBA Action 1 If not properly connected disconnect and reconnect 2 If dirty or o
6. Action 1 If clogged clean it Check Inspect the microphone on the Sub PBA Assembly and the Mic mesh on the Front Housing LCM TP Assembly Action 1 If dirty clean them Check Inspect the BtB connectors of Side Key FPC on both Sub PBA Assembly and Main PBA Action 1 If not properly connected disconnect and reconnect 2 If dirty or oxidized clean it 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 18 48 SONY make believe Troubleshooting Guide mech Problem Areas 3 If the Side key FPC is defective replace the Front Housing LCM TP Assembly 4 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 19 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 8 2 Secondary Microphone Check Inspect the Microphone s external port on the Front Housing LCM TP Assembly Action If clogged clean the port Check Inspect the microphone hole on Middle Frame Assembly and Battery cover Action 1 If dirty clean them Check Inspect the hole of Rubber 2 MIC and its direction Action 1 If dirty or direction wrong clean and reassemble it 2 If the rubber is damaged replace it Check Inspect the 2 MIC on Main PBA Action 1 If defective or damaged replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 20 48 SONY make
7. Check Inspect the USB connector Action If dirty or oxidized clean the connector Check Inspect the USB connector after removing Battery Cover Action lf dirty or oxidized clean the connector Check Inspect the USB connector on the main PBA Action 1 If dirty or oxidized clean the connector 2 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 47 48 SONY make believe 2 Revision Histor Troubleshooting Guide mech Rev Date ee a Comments REENEN 3 2013 04 24 oats document footer and chapter 1 27 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 48 48
8. believe Troubleshooting Guide mech Problem Areas 1 9 Vibrator 1 9 1 Vibrator not generating alerts Check Inspect the ZIF connector of the Link FPC to the Sub PBA Assembly Action 1 If not properly connected disconnect and reconnect 2 If dirty or oxidized clean it 3 If the vibrator or the BtB connector on the Sub PBA Assembly is damaged replace the Sub PBA Assembly 4 If the Side key FPC is defective replace the Front Housing LCM TP Assembly 5 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 21 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 10 Camera 1 10 1 Camera defects Check Inspect the external area of camera window Action 1 If dirty clean it 2 If the camera window scratched or damaged replace the Middle Frame Assembly Check Inspect the BtB connector of the Main Camera to the main PBA Action 1 If not properly connected disconnect and reconnect 2 If dirty or oxidized clean it Check Inspect the Main Camera Action 1 If the Main Camera is damaged replace it 2 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 22 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 10 2 Secondary Camera Check Inspect the external area of the video camera window Action 1 If dirty clean it
9. make believe Troubleshooting Guide mech 1 28 SIM 1 28 1 SIM not detected Check Inspect the external port of the SIM card holder and check if a SIM card can be properly inserted Action lf dirty or clogged clean the external port Check Inspect the SIM card holder on Main PBA Action lf damaged Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 42 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 28 2 Incorrect SIM Card adapter Check Check the SIM Card adapter is from THIS or not if the Micro SIM card is used Action 1 Use a proper this micro SIM adapter 1257 9796 2 If SIM Card connector is damaged deal with it according to local directive Check Check whether the SIM Card adapter is used correctly Action 1 Peel off the protection tape from SIM Card adapter 2 Assemble the Micro SIM card onto SIM Card adapter 3 Replace Main PBA 1 28 3 Incorrect SIM indicated Check Check whether the phone is locked to a particular operator and whether the correct operator SIM is being used Action 1 Use a proper operator SIM or test SIM 2 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 43 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 29 Charging 1 29 1 Battery will not charge Check Inspect the contact pads of the Battery Action
10. 1 If dirty or oxidized clean the pads 2 If damaged replace the Battery Check Inspect the battery contact pins Action 1 If dirty or oxidized clean the contact pins 2 If adhesive is detected on the contact pins use an eraser to gently rub off the adhesive Check Inspect the USB connector Action lf dirty or oxidized clean the connector Check Inspect the USB connector Action If dirty or oxidized clean the connector 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 44 48 SONY make belleve Troubleshooting Guide mech Problem Areas Check Inspect the USB connector on the main PBA Action 1 If dirty or oxidized clean the connector 2 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 45 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 30 HandsFree by Wire 1 30 1 Connection to Portable HandsFree fails Check Inspect the external port of the audio jack Action If dirty or oxidized clean the connector Check Inspect the audio jack on the main PBA Action 1 If dirty or oxidized clean it 2 If damaged Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 46 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 31 Data Communication 1 31 1 Data transfer via System Connector fails
11. Dy d iceciaeecece cc teen cctnescntec S 46 1 30 1 Connection to Portable HandsFree failS ccccssseeseeseeeeeeseeeeeeeeees 46 t31 Data COMMUNIC e EEN 47 1 31 1 Data transfer via System Connector Tails ssssssssssssssssss essen enes 47 2 REVISION e E LO TT 48 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 3 48 SONY make belleve Problem Areas 1 1 Power Troubleshooting Guide mech 1 1 1 Will not power on or will switch off randomly Check Check whether the phone vibrates by pressing the on off Key Action If activation of the vibrator is detected refer to section 1 4 Display Check Inspect the contact pads on the battery Action 1 If dirty or oxidized clean the pads 2 If damaged replace the battery Check Inspect the battery contact pins Action 1 If dirty or oxidized clean the contact pins 2 If adhesive is detected on the contact pins use an eraser to gently rub off the adhesive 3 If damaged Replace Main PBA Check Inspect the on off key Action 1 Refer to section 1 2 3 Key On Off 2 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 4 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 2 Keys PX 91 3 44 o CA WW 4 1 2 1 Back Home Menu Keys Check Inspect the Back Home Menu keys on Display Action 1 Refer to the s
12. Frame Assembly Action 1 If damaged replace the Middle Frame Assembly Check Inspect the RX Diversity Connector on Main PBA Action 1 If damaged replace the Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 39 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 27 Network amp Signal 1 27 1 No Poor signal Check Inspect the Antenna Main on the Middle Frame Assembly Action If dirty clean it B Check Inspect the contact pads on the Antenna Main and the contact pins on the Sub PBA Assembly Action 1 If dirty or oxidized clean the pads and pins 2 If damaged replace the Middle Frame Assembly lt gt Check Inspect the pins and connector on Sub PBA Assembly 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 40 48 SONY make believe Troubleshooting Guide mech Problem Areas Action 1 If the pins or the connector on the Sub PBA Assembly is damaged replace the Sub PBA Assembly Check Inspect the RF Cable between Sub PBA Assembly and Main PBA Action 1 If not properly connected disconnect and reconnect 2 If damaged replace the RF Cable Check Inspect the connector on Main PBA Action 1 If not properly connected disconnect and reconnect 2 If damaged Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 41 48 SONY
13. SONY make believe Troubleshooting Guide mechanical C2104 C2105 S36h 1273 2281 Rev2 Sony Mobile Communications AB Company Internal SONY make believe Troubleshooting Guide mech CONTENTS 1 Ge e Eu AQCAS oyrini aaia 4 TL FONS EE 4 1 1 1 Will not power on or will switch off random ssssssssssssssss sss sss esse esse ess s es 4 Mie UR OW T 5 1 21 BaCk FIOMG MOCNU KROYS T 5 12 2 VOIMIMO EE 5 Md OTA 6110 EE 6 124 C mera KEV E 8 Eo TOUCA SCOE Maoa 10 1 3 1 Touch Screen malfunction sssssssssssssss sss esssssss gege essen eena 10 RE ee VE 11 1 4 1 Graphics amp Illumination E 11 KS EISEN eege 12 ach CEDMUMINAUOM TTT 12 TO Speaker ects savers EE RS 14 TOI E 14 Tah Tn e eT 17 re WR Gig e le LC 17 1 8 leide e Lu e E 18 1 8 1 Main Microphone eege ege dee eege 18 1 8 2 Secondary Microphone cccccccessceeseeeseeeseeeeseeeenseeenseeeaseeenseseaseseanenes 20 KO VID ALOR EE 21 1 9 1 Vibrator not generating alerts sssssssssssssssesssss esse esse ees enesenn enen ene 21 110 eT EEN 22 IS Camera defet TT 22 1 10 2 Secondary Camera WE 23 EII a TR LED coniicere Eai 24 1 11 1 Flash LED not e le BE 24 t12 BIUCTOOIN and WEAN EE 25 1 12 1 Bluetooth or WLAN connection failure ccccsscceeseeseseeeeeeseeenseeeseeeaeees 25 LY GPS ana E 26 TISI C1 21 ET Tere TT 26 N14 COMPASS T 27 1 N COMPASS Tal TTT 27 NEE e TE E 28 1 15 1 Accelerometer test fails
14. d replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 25 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 13 GPS 1 13 1 GPS malfunctions Check Inspect the Antenna GPS on the Middle Frame Assembly Action 1 If dirty clean it Check Inspect the contact pads on the Antenna BT WIFI and the contact pins on the main PBA Action 1 If dirty or oxidized clean the pads and pins 2 If defective or damaged replace the Middle Frame Assembly 3 If the pins are damaged replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 26 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 14 Compass 1 14 1 Compass fails Action Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 27 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 15 Accelerometer 1 15 1 Accelerometer test fails Action Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 28 48 SONY make belleve Troubleshooting Guide mech Problem Areas 1 16 Ambient Light Sensor 1 16 1 Ambient Light Sensor Check Inspect the external area of the Ambient Light Sensor window Action 1 If dirty clean it 2 If the external window area is damaged replace the Front Housing LCM TP Assembly Check
15. ection 1 3 Touch Screen 0o amp 2 Replace Main PBA WALKMAN Album Movies Sony Sele 1 2 2 Volume Key Check Inspect the external area of the volume key Action lf dirty clean it Check Inspect the volume key switch on Main PBA Action 1 If dirty clean them 2 If the volume key is damaged replace the Battery Cover 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 5 48 SONY make believe Troubleshooting Guide mech Problem Areas Check Inspect the Film Side Key FPC on main PBA Action 1 If Missing or damaged replace it 2 If the volume key switch is damaged replace Main PBA 1 2 3 On Off Key Check Inspect the external area of the on off key Action lf dirty clean it Check Inspect the on off key on Middle Frame Assembly Action 1 If dirty or stuck clean and reassemble it 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 6 48 SONY make belleve Troubleshooting Guide mech Problem Areas 2 If the on off key is damaged replace the Power Key Check Inspect the on off key dome on Side FPC Action 1 If dirty or oxidized clean it Check Inspect the BtB connector on Side FPC to Main PBA 1 If not properly connected disconnect and reconnect 2 If the Side FPC is defective replace the Front Housing LCM TP Assembly 3 Replace Main PBA 1273 2281 Rev2
16. ions AB Company Internal 12 48 SONY make believe Troubleshooting Guide mech Problem Areas Check Inspect the BtB connectors of Side Key FPC on both Sub PBA Assembly and Main PBA Action 1 If not properly connected disconnect and reconnect 2 If dirty or oxidized clean it 3 If the Side key FPC is defective replace the Front Housing LCM TP Assembly 4 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 13 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 6 Speaker 1 6 1 Speaker Check Inspect the Loudspeaker s external port on the Battery Cover Action 1 If the Loudspeaker external port is clogged clean it 2 If the Loudspeaker external port is damaged replace the Battery Cover Check Inspect the mesh of the Loudspeaker on the Middle Frame Assembly Action 1 If dirty clean it 2 If the mesh is damaged replace the Middle Frame Assembly 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 14 48 SONY make believe Troubleshooting Guide mech Problem Areas Check Inspect the Loudspeaker s pins and the pads on the Sub PBA Assembly Action 1 If dirty clean them 2 If the pins of the Loudspeaker are damaged replace the Loudspeaker Check Inspect the BtB connectors of Side Key FPC on both Sub PBA Assembly and Main PBA
17. ntact pins 2 If adhesive is detected on the contact pins use an eraser to gently rub off the adhesive 3 If damaged Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 36 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 24 Verify Certificates 1 24 1 Verify certificates fails Action Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 37 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 25 NFC Test 1 25 1 NFC Test fails Check Inspect the pads of NFC Antenna on Battery Cover Action 1 If dirty or oxidized clean the contact pins 2 If damaged Replace the NFC Antenna Check Inspect the pins of NFC Antenna through Middle Frame Assembly Action 1 If dirty or oxidized clean the contact pins 2 If damaged Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 38 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 26 RX Diversity Test 1 26 1 RX Diversity Test fails Check Inspect the RX Diversity antenna on Middle Frame Assembly Action 1 If dirty clean it 2 If damaged replace the Middle Frame Assembly Check Inspect the RX Diversity Cable connector through Middle Frame Assembly Action 1 If loosen or open reassemble it Check Inspect the RX Diversity Cable on Middle
18. oblem Areas 1 20 External Memory 1 20 1 Memory Card not detected Check Inspect the external port of the memory card holder and check if a memory card can be properly inserted Action lf dirty or clogged clean the external port Check Inspect the memory card holder on Main PBA Action 1 If dirty or clogged clean the holder 2 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 33 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 21 Security 1 21 1 Security fails Action Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 34 48 SONY make believe Troubleshooting Guide mech 1 22 FM Radio 1 22 1 No Poor FM Radio reception Check Inspect the external port of the audio jack Action lf dirty or oxidized clean it Check Inspect the audio jack on the main PBA Action 1 If dirty or oxidized clean it 2 If damaged Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 35 48 SONY make believe Troubleshooting Guide mech Problem Areas 1 23 Battery Test 1 23 1 Battery Test Fails Check Inspect the contact pads on the battery Action 1 If dirty or oxidized clean the pads 2 If damaged replace the battery Check Inspect the battery contact pins Action 1 If dirty or oxidized clean the co
19. xidized clean it 3 If the touch screen or the TP FPC is damaged replace the Front Housing LCM TP Assembly 4 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 10 48 SONY make belleve Troubleshooting Guide mech Problem Areas 1 4 Display 1 4 1 Graphics amp Illumination Check Check whether the phone vibrates after the on off key has been pressed Action If the activation described above is not detected refer to section 1 1 Power Check Inspect the BtB connector of the LCM to the main PBA Action 1 If not properly connected disconnect and reconnect 2 If dirty or oxidized clean it 3 If the display or the LCM FPC is damaged replace the Front Housing LCM TP Assembly 4 Replace Main PBA 1273 2281 Rev2 Sony Mobile Communications AB Company Internal 11 48 SONY make believe Troubleshooting Guide mech 1 5 LED IIlumination 1 5 1 LED IIlumination Check Inspect the external window area of the LED on the Front Housing LCM TP Assembly Action 1 If dirty clean it 2 If the external window area is damaged replace the Front Housing LCM TP Assembly Check Inspect the LED on the Sub PBA Assembly and the Front Housing LCM TP Assembly Action 1 If dirty or clogged clean them 2 If the Sub PBA Assembly is damaged replace it 1273 2281 Rev2 Sony Mobile Communicat
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