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Lenovo manual ThinkPad T420 and T420i Hardware Maintenance Manual

Models: T420i T420

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72ThinkPad T420 and T420i Hardware Maintenance Manual

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Note: Plug the yellow cable into the jack labeled MAIN, and the blue cable into the jack labeled AUX on the card.

If the computer you are servicing is a wireless WAN-ready model and does not have a wireless WAN card, route the antenna cables and secure them with a tape as shown in the following figure.

72ThinkPad T420 and T420i Hardware Maintenance Manual

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Lenovo manual ThinkPad T420 and T420i Hardware Maintenance Manual

Contents

ThinkPad T420 and T420i Hardware Maintenance Manual Fourth Edition November Copyright Lenovo Contents ii ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 10. Parts listWireless LAN antenna assembly or wireless Chapter 9. LocationsAbout this manual iv ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 1. Safety information General safetyElectrical safety Safety inspection guide Handling devices that are sensitive to electrostatic dischargeGrounding requirements DANGER Safety notices multilingual translationsDANGER DANGERDANGER 6 ThinkPad T420 and T420i Hardware Maintenance ManualDANGER DANGERChapter 1. Safety information PERIGOPERIGO PERIGOPERIGO PERIGODANGER PERIGODANGER DANGERDANGER DANGERDANGER DANGERVORSICHT VORSICHTVORSICHT VORSICHT12 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 1. Safety information 14 ThinkPad T420 and T420i Hardware Maintenance Manual Antes de encender el sistema despues de sustituir una FRU, compruebe que todos los tornillos, muelles y demás piezas pequeñas se encuentran en su sitio y no se encuentran sueltas dentro del sistema. Compruébelo agitando el sistema y escuchando los posibles ruidos que provocarían. Las piezas metálicas pueden causar cortocircuitos eléctricos 16 ThinkPad T420 and T420i Hardware Maintenance Manual Laser compliance statement multilingual translations English Arabic Brazilian Portuguese French German Hebrew JapaneseKorean Spanish Traditional Chinese 18 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 1. Safety information 20 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 1. Safety information 22 ThinkPad T420 and T420i Hardware Maintenance Manual Strategy for replacing a hard disk drive Chapter 2. Important service informationStrategy for replacing FRUs Before replacing partsHow to use error message Important notice for replacing a system board24 ThinkPad T420 and T420i Hardware Maintenance Manual Dynamic Configure To Order CTO Strategy for replacing FRUs for CTO, CMV, and GAV Product definitionFRU identification for CTO, CMV, and GAV products Using PEW1. Click Products & Service Warranty 2. Click Check Warranty Status Using the HMMTo view the key commodities, do the following “Power system checkout” on page Chapter 3. General checkout“Diagnostics using PC-Doctor for DOS” on page This chapter presents following informationWhat to do first The following are not covered under warrantyDiagnostics using PC-Doctor for DOS Testing the computerCheckout guide If an error code appears, go to “Symptom-to-FRU index” on page Windows Lenovo ThinkVantage ToolboxDetecting system information with PC-Doctor Windows VistaR and Windows XP32 ThinkPad T420 and T420i Hardware Maintenance Manual FRU tests The following table shows the test for each FRUTable 1. FRU tests Power system checkout Checking the ac power adapterChecking operational charging Checking the battery pack Checking the backup batteryIf the voltage is not correct, replace the backup battery 36 ThinkPad T420 and T420i Hardware Maintenance ManualIf the voltage is correct, replace the system board Operating System Recovery Disc one disc Chapter 4. Related service informationRestoring the factory contents by using Recovery Disc Set Applications and Drivers Recovery Disc one or more discsHard-disk password PasswordsPower-on password 2. Insert the Operating System Recovery Disc into the DVD driveHow to remove the hard-disk password Supervisor passwordHow to remove the power-on password B If an SVP has been set and is known by the service technician40 ThinkPad T420 and T420i Hardware Maintenance Manual 6. Select Master HDPSleep standby mode Power managementScreen blank mode Hibernation modeThe system is powered off Symptom-to-FRU index Numeric error codesTable 2. Numeric error codes continued 44 ThinkPad T420 and T420i Hardware Maintenance ManualPlace the ThinkPad Notebook on a horizontal surface Error messages Table 3. Error messagesLCD-related symptoms Beep symptomsNo-beep symptoms Table 4. Beep symptomsReseat the LCD connectors Table 6. LCD-related symptomsSymptom or error See important note for “LCD-related symptoms.”Intermittent problems Undetermined problems48 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 5. Status indicators available while the microphone mute is on by default Status indicatorsIndicator Wireless LAN, Wireless WANthe battery status indicator stops blinking, but the charging may Table 7. Status indicators continuedThe battery is being charged. When it reaches 20%, the blinking Chapter 5. Status indicatorsTable 7. Status indicators continued The ac power adapter is attached to the computerKey combination Chapter 6. Fn key combinationsTable 8. Fn key combinations DescriptionTable 8. Fn key combinations continued Table 8. Fn key combinations continued Fn+PrtSc56 ThinkPad T420 and T420i Hardware Maintenance Manual External CRU statement to customers Chapter 7. FRU replacement noticesScrew notices Plastic to plasticTorque driver Retaining serial numbersRestoring the serial number of the system unit 3. Select 2. Read S/N data from EEPROMMTM on rear label Retaining the UUIDReading or writing the ECA information Product ID on rear label60 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 8. Removing and replacing a FRU External CRU statement to customersDANGER Before servicing ThinkPad T420 and T420i 62 ThinkPad T420 and T420i Hardware Maintenance Manual1010 Battery pack Important notice for replacing a battery packRemoval steps of battery pack DANGER 1020 ExpressCard blank bezel Removal steps of ExpressCard blank bezel1030 Serial Ultrabay Enhanced device or travel bezel Removal steps of Serial Ultrabay Enhanced device or travel bezel1040 Hard disk drive HDD and solid state drive SSD Removal steps of hard disk drive and solid state driveFor SSD and spacers For HDD and HDD rubber rails 9.5 mmFor HDD and HDD rubber rails 7.0mm Chapter 8. Removing and replacing a FRU68 ThinkPad T420 and T420i Hardware Maintenance Manual 1050 DIMM slot cover Removal steps of DIMM slot cover1060 DIMM in the slot on the underside of the computer Removal steps of DIMM in the slot on the underside of the computer1070 PCI Express Mini Card for wireless WAN Removal steps of PCI Express Mini Card for wireless WAN72 ThinkPad T420 and T420i Hardware Maintenance Manual 1080 Keyboard Removal steps of keyboard3 , and then detach the connector Installation steps of keyboardLift the keyboard a little in the direction shown by arrow Chapter 8. Removing and replacing a FRU 4. Make sure that the front edge of the keyboard is attached firmly1090 DIMM in the slot under the keyboard Removal steps of DIMM in the slot under the keyboard78 ThinkPad T420 and T420i Hardware Maintenance Manual 1100 Backup battery Removal steps of backup battery DANGER80 ThinkPad T420 and T420i Hardware Maintenance Manual 1110 PCI Express Mini Card for wireless LAN Removal steps of PCI Express Mini Card for wireless LANWhen installing 82 ThinkPad T420 and T420i Hardware Maintenance Manual1120 Keyboard bezel assembly, FPC cable, and Bluethooth daughter card Screw quantity 84 ThinkPad T420 and T420i Hardware Maintenance ManualStep ColorWhen installing Make sure that the connector is attached firmly Chapter 8. Removing and replacing a FRUWhen installing Make sure that the connectors are attached firmly 86 ThinkPad T420 and T420i Hardware Maintenance ManualWhen installing Make sure that the connector is attached firmly Chapter 8. Removing and replacing a FRU1130 SmartCard Removal steps of SmartCardWhen installing Make sure that the connector is attached firmly Removal steps of SmartCard dummy spacer1140 Modem daughter card MDC Removal steps of modem daughter card MDC1150 Speaker assembly Removal steps of speaker assembly92 ThinkPad T420 and T420i Hardware Maintenance Manual 1160 LCD unit Removal steps of LCD unitScrew quantity 94 ThinkPad T420 and T420i Hardware Maintenance ManualStep ColorWhen installing Make sure that you attach the connectors firmly96 ThinkPad T420 and T420i Hardware Maintenance Manual For Discrete Graphics models 1170 Fan assemblyRemoval steps of fan assembly For Integreted Graphics models98 ThinkPad T420 and T420i Hardware Maintenance Manual For Discrete Graphics models1a 1d 1c 1b For Integreted Graphics models When installing For Discrete Graphics modelsFor Integrated Graphics models Make sure that the fan connector is attached firmly 1180 CPU Removal steps of CPU1190 Base cover assembly and DC-in connector cable Removal steps of base cover assembly and DC-in connector cableScrew quantity When installing Make sure that the connector is attached firmlyStep ColorNote Applying labels to the base cover Wireless WAN MAC address label China mobile IMEI label 1200 Magnesium structure frame Removal steps of magnesium structure frame0.181 Nm M2 × 8 mm, wafer-head, nylon-coatedBlack 1.85 kgfcm1210 System board and ExpressCard slot assembly Removal steps of system board and ExpressCard slot assemblyFor Switchable Graphics models For Integrated Graphics models Platform Controller Hub PCHGraphic Processing Unit GPU Discrete graphics chip 1220 mSATA solid state drive 110 ThinkPad T420 and T420i Hardware Maintenance ManualScrew quantity Removal steps of mSATA solid state driveStep Color2010 LCD bezel assembly Removal steps of LCD bezel assembly2020 LED board Removal steps of LED boardWhen installing Make sure that the connector is attached firmly 114 ThinkPad T420 and T420i Hardware Maintenance Manual2030 Integrated camera Removal steps of integrated camera116 ThinkPad T420 and T420i Hardware Maintenance Manual 2040 LCD panel and LCD cable Removal steps of LCD panel and LCD cableWhen installing Make sure that the connector is attached firmly 118 ThinkPad T420 and T420i Hardware Maintenance Manual2050 Camera cable Removal steps of camera cable120 ThinkPad T420 and T420i Hardware Maintenance Manual Color StepScrew quantity Torque2070 Hinges and LCD rear cover assembly Removal steps of hinges and LCD rear cover assemblyChapter 8. Removing and replacing a FRU 124 ThinkPad T420 and T420i Hardware Maintenance Manual Chapter 9. Locations Front view126 ThinkPad T420 and T420i Hardware Maintenance Manual DisplayPort connector USB connector RJ-45 Ethernet connector Rear viewStatus indicators External monitor connector Power jack USB connectorBottom view Battery pack Battery pack latch DIMM slot Docking connectorLCD cover latch “Information about ac power adapters” on page “Power cords” on page Chapter 10. Parts listThis chapter contains following lists of the service parts “Recovery discs” on page “Common service tools” on pageOverall 130 ThinkPad T420 and T420i Hardware Maintenance ManualIntel Centrino Wireless-N Parts list-OverallThinkPad b/g/n Wireless 1x1 BGN FRU OverallFRU no Table 9. Parts list-Overall continuedFRU Overall CRU IDFRU no Table 9. Parts list-Overall continuedFRU Overall CRU IDFRU Overall Table 9. Parts list-Overall continued134 ThinkPad T420 and T420i Hardware Maintenance Manual FRU noFRU no Table 9. Parts list-Overall continuedFRU Overall CRU IDFRU Overall Table 9. Parts list-Overall continued136 ThinkPad T420 and T420i Hardware Maintenance Manual FRU noFRU no Table 9. Parts list-Overall continuedFRU Overall CRU IDFRU Overall Table 9. Parts list-Overall continued138 ThinkPad T420 and T420i Hardware Maintenance Manual FRU noFRU no Table 9. Parts list-Overall continuedFRU Overall CRU IDFRU Overall Table 9. Parts list-Overall continued140 ThinkPad T420 and T420i Hardware Maintenance Manual FRU noFRU no Table 9. Parts list-Overall continuedFRU Overall CRU IDFRU Overall Table 9. Parts list-Overall continued142 ThinkPad T420 and T420i Hardware Maintenance Manual FRU noFRU no Table 9. Parts list-Overall continuedFRU Overall CRU IDFRU Overall Table 9. Parts list-Overall continued144 ThinkPad T420 and T420i Hardware Maintenance Manual FRU noFRU no Table 9. Parts list-Overall continuedFRU Overall CRU IDFRU Overall Table 9. Parts list-Overall continued146 ThinkPad T420 and T420i Hardware Maintenance Manual FRU noFRU no Table 9. Parts list-Overall continuedFRU Overall CRU IDFRU Overall Table 9. Parts list-Overall continued148 ThinkPad T420 and T420i Hardware Maintenance Manual FRU noFRU no Table 9. Parts list-Overall continuedFRU Overall CRU IDLCD bezel assembly LCD FRUsTable 10. Parts list-LCD FRUs FRU noFRU no Table 10. Parts list-LCD FRUs continuedNo. FRU 2 Camera moduleTable 10. Parts list-LCD FRUs continued 152 ThinkPad T420 and T420i Hardware Maintenance ManualFRU no Table 10. Parts list-LCD FRUs continued FRU noKeyboard Table 11. Parts list-Keyboard45N2090 Table 11. Parts list-Keyboard continuedNetherlands 45N2160Miscellaneous parts Table 12. Parts list-Miscellaneous partsTable 12. Parts list-Miscellaneous parts continued FRU noInformation about ac power adapters Table 13. Parts list-2-pin ac power adaptersTable 14. Parts list-3-pin ac power adapters Power cords Table 15. Parts list-2-pin power cordsTable 16. Parts list-3-pin power cords Recovery discs Windows XP Professional DVDsWindows Vista Business 32 bit SP2 DVDs Windows 7 Professional 32 bit DVDs Table 20. Parts list-Windows 7 Professional 32 bit recovery DVDsWindows Vista Home Basic 32 bit SP2 DVDs Windows 7 Professional 64 bit DVDs4179-CTO, GBx, GEx Windows 7 Home Basic 32 bit DVDs Windows 7 Home Premium 32 bit DVDsWindows 7 Home Premium 64 bit DVDs Table 23. Parts list-Windows 7 Home Premium 32 bit recovery DVDsTable 24. Parts list-Windows 7 Home Premium 64 bit recovery DVDs 4178-CTO, 9Fx, 9Nx, A6x, BWx, CLx, CMx, CNx 4179-CTO, GMx, GNxWindows 7 Ultimate 32 bit DVDs Table 25. Parts list-Windows 7 Ultimate 32 bit recovery DVDsTable 26. Parts list-Windows 7 Ultimate 64 bit recovery DVDs Windows 7 Ultimate 64 bit DVDsCommon service tools Table 27. Parts list-Common service toolsAppendix A. Notices Lenovo United States, Inc 1009 Think Place - Building OneMorrisville, NC U.S.A Attention Lenovo Director of Licensing Electronic emissions notices 168 ThinkPad T420 and T420i Hardware Maintenance ManualTrademarks 170 ThinkPad T420 and T420i Hardware Maintenance Manual Page 0A6000703 Part Number 0A6000703 1P P/N 0A6000703