Instruction/ maintenance manual of the product T420 Lenovo
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ThinkP ad T420 and T420i Har dwar e Maint enance Manual.
Note: Before using this information and the pr oduct it supports, be sur e to read the gener al information under Appendix A “Notices” on page 167.
Contents About this manual . . . . . . . . . . . iii Chapter 1. Safety information . . . . . . 1 General safety . . . . . . . . . . . . . . . . 1 Electrical safety . . . . . . . . . . . . . . . 2 Safety inspection guide . . . . . . . . . . . . 3 Handling devices that ar e sensitive t o electr ostatic discharge .
1160 L CD unit . . . . . . . . . . . . . . . 93 1170 F an assembly . . . . . . . . . . . . . 97 1180 CPU . . . . . . . . . . . . . . . . 101 1190 Base cover assembly and DC-in connect or cable . . . . . . . . . . . . . . . . . . 102 1200 Magnesium structure fr ame .
About this manual This manual contains service and r eference information for the following ThinkP ad ® products. ThinkP ad T420 and T420i Machine T ype 4177, 4178, 4179, 4180, 4236, 4237, and 4238 Use this manual along with the advanced diagnostic tests to troubleshoot pr oblems.
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Chapter 1. Safety information This chapter presents following safety information that you need to be familiar with befor e you service a ThinkPad Notebook.
Electrical safety 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 mat erial that does not insulate you when working with live electrical curr ents.
– Use caution; do not become a victim yourself. – Switch off power . – Send another person t o get medical aid. Safety inspection guide The purpose of this inspection guide is to assist you in identifying pot entially unsafe conditions.
Notes: 1. Use product-specic ESD pr ocedures when they ex ceed the requirements noted here. 2. Make sure that the ESD pr otective devices you use have been certied (ISO 9000) as fully effective. When handling ESD-sensitive parts: • K eep the parts in prot ective packages until they ar e inserted into the product.
Safety notices (multilingual translations) The safety notices in this section ar e pr ovided in the following languages: • English • Ar abic • Br azilian P ortuguese • F r ench • German • .
DANGER If the L CD br eaks and the uid from inside the L CD gets into your eyes or on your hands, immediately wash the affected areas with water for at least 15 minutes.
PERIGO Chapter 1 . Safety information 7.
Antes de ligar o computador após a substituição da FRU, certique-se de que todos os parafusos, molas e outras peças pequenas estejam no lugar e não estejam soltos dentro do computador . V erique isso sacudindo o computador e procurando ouvir sons de peças soltas.
Embora as principais baterias possuam baixa voltagem, uma bateria em curto-circuito ou aterr ada pode produzir corr ente o bastante par a queimar mat eriais de pessoal ou inamáveis.
DANGER Si le panneau d'afchage à cristaux liquides se brise et que vous recevez dans les yeux ou sur les mains une partie du uide, rincez-les abondamment pendant au moins quinze minutes. Consulte z un médecin si des symptômes persistent après le lavage.
VORSICHT Akkus enthalten geringe Mengen von Nick el. Sie dürfen nicht zerlegt, wieder aufgeladen, kurzgeschlossen, oder F euer oder Wasser ausgesetzt werden. Bei der Entsorgung die örtlichen Bestimmungen für Sondermüll beachten. Beim Ersetzen der Batt erie nur Batterien des T yps verwenden, der in der Ersatzt eilliste aufgeführt ist.
Wenn ein Austausch der FRU bei laufendem Betrieb nicht erlaubt ist, gehen Sie beim Austausch der FRU wie folgt vor: Schalten Sie den Computer aus, ziehen Sie alle Netzkabel von den Netzsteckdosen ab, entfernen Sie den Akku und ziehen Sie alle miteinander verbundenen Kabel ab.
Chapter 1 . Safety information 13.
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Antes de encender el sistema despues de sustituir una FRU, compruebe que todos los tornillos, muelles y demás pie zas pequeñas se encuentran en su sitio y no se encuentr an sueltas dentro del sistema. Compruébelo agitando el sistema y escuchando los posibles ruidos que provocarían.
Par a evitar descargas, no quite la cubierta de plástico que rodea la parte baja de la tarjeta invertida. Aunque las bat erías principales tienen un voltaje bajo, una batería cortocircuitada o con contact o a tierra puede producir la corrient e suciente como para quemar material combustible o provocar quemaduras en el personal.
Laser compliance statement (multilingual translations) The laser compliance stat ements in this section are provided in the following languages: • English • Ar abic • Br azilian P ortuguese • F r ench • German • Hebr ew • Japanese • K orean • Spanish • T r aditional Chinese Chapter 1 .
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Chapter 1 . Safety information 19.
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Chapter 1 . Safety information 21.
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Chapter 2. Important service information This chapter pr esents following important service information that applies to all machine types supported by this manual: • “Str ategy for r eplacing FRUs.
Attention: The drive startup sequence in the computer you are servicing may have been changed. Be extr emely car eful during writ e oper ations such as copying, saving, or formatting. If you select an incorr ect drive, data or progr ams can be overwritten.
Strat egy for replacing FRUs for CT O , CMV , and GA V Pr oduct denition Dynamic Congure T o Order (C TO) This provides the ability for a customer to congure a L enovo solution from an eSite, and have this conguration sent to fulllment, wher e it is built and shipped directly to the customer .
• eSupport can be used to view the list of key commodities built in a particular machine serial (this is the same recor d found in PEW). • eSupport can be accessed at the following W eb site: http://www.lenovo.com/support • T o view the k ey commodities, do the following: 1.
Chapter 3. General check out This chapter pr esents following information: • “What to do rst” on page 28 • “Checkout guide” on page 29 – “Diagnostics using PC-Doctor for DOS” on p.
What to do rst When you do r eturn a FRU, you must include the following information in the parts ex change form or parts return form that you attach to it: 1. Name and phone number of service technician 2. Date of service 3. Date on which the machine failed 4.
Checkout guide Use the following pr ocedures as a guide in identifying and corr ecting pr oblems with the ThinkP ad Notebook. Note: The diagnostic tests ar e int ended to test only ThinkP ad pr oducts. The use of non- ThinkP ad products, prot otype car ds, or modied options can lead t o false indications of errors and invalid system responses.
3. T urn on the computer . If the computer cannot be power ed on, go t o “P ower system checkout” on page 34, and check the power sources. If an error code appears, go t o “Symptom-t o-FRU inde x” on page 43. 4. When the ThinkP ad logo comes up, immediately press F12 to enter the Boot Menu.
11. F ollow the instructions on the screen. If ther e is a problem, PC-Doct or shows messages describing it. 12. T o exit the t est, select Quit — Exit Diag . T o cancel the test, press Esc. Note: After running PC-Doct or , check the time and date on the system and r eset them if they ar e incorrect.
F or additional information about this progr am, see the Help for the pr ogram. 32 ThinkP ad T420 and T420i Hardware Maintenance Manual.
FRU t ests The following table shows the test for each FRU . T able 1. FRU tests FRU Applicable t est Systemboar d 1. Diagnostics ➙ CPU/Coprocessor 2. Diagnostics ➙ Systemboard 3. If the docking station or the port r eplicator is attached t o the ThinkP ad Not ebook, detach it.
P ower system check out T o verify a symptom, do the following: 1. T urn off the computer . 2. Remove the batt ery pack. 3. Connect the ac power adapt er . 4. Check that power is supplied when you turn on the comput er . 5. T urn off the computer . 6.
P erform oper ational char ging. If the battery status indicator or icon does not turn on, r emove the battery pack and let it r eturn to room temper ature. Reinstall the batt ery pack. If the char ge indicator or icon still does not turn on, replace the battery pack.
Wire V oltage (V dc) Red +2.5 t o +3.2 Black Ground • If the voltage is corr ect, replace the syst em board. • If the voltage is not correct, r eplace the backup batt ery . • If the backup battery discharges quickly after replacement, r eplace the system boar d.
Chapter 4. Related service information This chapter pr esents following information: • “Restoring the fact ory contents by using Recovery Disc Set” on page 37 • “P asswords” on page 38 •.
2. Insert the Operating S ystem Recovery Disc into the DVD drive. 3. Press F10 to save the ThinkP ad Setup progr am congur ation changes. F ollow the instructions on the screen t o begin the recovery process. 4. Select your language and click Next .
Attention: If the user HDP has been forgott en, check whether a mast er HDP has been set. If it has, it can be used for access to the hard disk drive. If no master HDP is available, neither Lenovo nor.
2. When the ThinkP ad logo comes up, immediately press F1 t o enter the ThinkP ad Setup pr ogram. When the POP icon is appearing on the scr een, enter the POP . 3. Select Security , using the cursor directional keys t o move the menu. 4. Select P assword .
P ower management T o r educe power consumption, the computer has thr ee power management modes: scr een blank, sleep (standby in Windows XP), and hibernation. Screen blank mode If the time set on the “T urn off monit or ” timer in the oper ating syst em expir es, the L CD backlight turns off.
• The system is powered off. Note: If the comput er enters the hibernation mode while it is dock ed to the docking station, do not undock it before r esuming normal operation. If you do undock it and then try to r esume normal oper ation, you will get an err or message, and you will have to restart the system.
Symptom-to-FRU inde x This section contains following information: • “Numeric error codes” on page 43 • “Error messages” on page 45 • “Beep symptoms” on page 46 • “No-beep sympto.
T able 2. Numeric error codes (continued) Symptom or error FRU or action, in sequence 0191 System Security—Invalid Remote Change request ed. 1. Run the ThinkP ad Setup program, and then save current setting by pressing F10. 2. System boar d. 0199 System Security— Security passwor d retry count ex ceeded.
Error messages T able 3. Error messages Symptom or error FRU or action, in sequence F an err or . 1. F an . 2. Thermal grease. 3. System boar d. Thermal sensing error . System board . This syst em does not support batt eries that are not genuine Lenovo-made or authoriz ed.
Beep symptoms T able 4. Beep symptoms Symptom or error FRU or action, in sequence One beep and a blank, unreadable, or ashing L CD. 1. Reseat the L CD connect or . 2. L CD assembly . 3. External CRT . 4. System boar d. One long and two short beeps, and a blank or unreadable L CD.
• L enovo will not pr ovide r eplacement if the L CD is within specication as we cannot guar antee that any replacement L CD will have zer o pixel defects. • One pix el consists of R, G, B sub-pix els. T able 6. L CD-related symptoms Symptom or error FRU or action, in sequence No beep, power -on indicat or on, and a blank L CD during POST .
Intermittent pr oblems Intermittent system hang pr oblems can be due to a variety of causes that have nothing to do with a hardwar e defect, such as cosmic r adiation, electr ostatic dischar ge, or software err ors. FRU replacement should be considered only when a pr oblem recurs.
Chapter 5. Status indicators This chapter presents the system status indicators that show the status of the computer . 7 1 2 6 8 9 3 4 5 © Copyright L enovo 2011 49.
5 6 1 1 1 0 T able 7. S tatus indicators Indicator Meaning 1 Speaker mute Orange: The speaker is on mut e. T o set the speakers on mute or unmute, press the speak er mut e button. 2 Microphone mut e Orange: The micr ophone is on mute. None of the recor ding devices is available while the microphone mute is on by default.
T able 7. Status indicators (continued) Indicator Meaning 6 P ower on Green: The computer is on and r eady to use. This indicat or stays lit around the power -on button whenever the computer is on and is not in sleep (standby) mode. Note: This indicator blinks when the comput er is in sleep mode.
T able 7. Status indicators (continued) Indicator Meaning The ac power adapter is attached to the computer . The battery status indicator is off: The battery pack of the computer is fully charged or detached. 11 Sleep (standby for Windows XP) status Green: The computer is in sleep (standby) mode.
Chapter 6. Fn key combinations The following table shows the function of each combination of Fn with a function k ey . T able 8. Fn k ey combinations Key combination Description Fn+F1 Reserved.
T able 8. Fn key combinations (continued) Key combination Description Note: T o switch between the computer display and an e xternal monitor , the Win+P key combination is also available. F or Windows Vista and Windows XP: Switch between the computer display and an e xternal monitor .
T able 8. Fn key combinations (continued) Key combination Description Fn+PrtSc Have the same function as the SysRq key . Fn+ScrLk Enable or disable the numeric keypad. The indicator of numeric lock will be displayed on the scr een. Fn+P ause Have the same function as the Br eak k ey .
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Chapter 7. FRU replacement notices This chapt er pr esents notices relat ed to r emoving and replacing parts. Read this chapter carefully before replacing any FRU.
• T orque driver If you have a tor que driver , refer to the “T orque” column for each step. • Make sure that you use the correct scr ew. If you have a t orque scr ewdriver , tighten all screws rmly to the tor que shown in the table. Never use a screw that you removed.
MTM on rear label: TTTT -C T O S/N SSSSSSS Product ID on rear label: TTTT -MMM (Use this number when setting Serial Number) In the example, the Serial Number to be input is “1S TTTTMMMSSSSSSS”.
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Chapter 8. Removing and replacing a FRU This chapter presents directions and dr awings for use in removing and replacing a FRU . External CRU statement to customers : Some problems with your pr oduct can be r esolved with a replacement part you can install yourself, called a “Cust omer Replaceable Unit” or “CRU .
Before servicing ThinkP ad T420 and T420i Some models of the ThinkP ad T420 and T420i you are servicing might have the SIM car d that the cust omer has installed. If the comput er you ar e servicing has the SIM card, r emove it befor e you start the servicing.
1010 Battery pack Important notice for replacing a battery pack: Lenovo ThinkV antage T oolbo x (in Windows 7) has an automatic battery diagnostic that det ermines if the battery pack is defective. A battery pack FRU should not be r eplaced unless this diagnostic shows that the battery is defective.
1020 Expr essCard blank bezel Removal steps of ExpressC ard blank bezel When you press the ExpressC ard blank bezel 1 , it pops out 2 . 1 2 When installing: Mak e sur e that the be zel is correctly oriented as shown in the following gur e.
1030 Serial Ultrabay Enhanced device or tr avel bezel F or access, remove this FRU: • “1010 Battery pack” on page 63 Removal steps of Serial Ultrabay Enhanced device or tr avel bez el Holding th.
1040 Hard disk drive (HDD) and solid state drive (SSD) F or access, remove this FRU: • “1010 Battery pack” on page 63 Attention: • Do not dr op the drive or apply any physical shock t o it. The drive is sensitive to physical shock. Improper handling can cause damage and permanent loss of data.
4 3 F or HDD and HDD rubber rails (9.5 mm): 4 4 F or HDD and HDD rubber rails (7.0mm) : 4 4 F or SSD and spacers: 4 4 Chapter 8 . Removing and replacing a FRU 67.
When installing: Make sure that SSD spacers or HDD rubber rails ar e attached rmly . 68 ThinkP ad T420 and T420i Hardware Maintenance Manual.
1050 DIMM slot cover F or access, remove this FRU: • “1010 Battery pack” on page 63 Removal steps of DIMM slot cover Note: L oosen the scr ew 1 , but do not r emove it.
1060 DIMM (in the slot on the underside of the computer) F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 Note: Y our comput er has two DIMM slots: one under the keyboard and another on the underside of the computer .
1070 PCI Expr ess Mini C ard for wireless W AN F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 Removal steps of PCI Expr ess .
3 Note: Plug the yellow cable int o the jack labeled MAIN , and the blue cable int o the jack labeled A UX on the car d. If the comput er you ar e servicing is a wireless WAN-r eady model and does not have a wir eless WAN card, rout e the antenna cables and secure them with a tape as shown in the following gur e.
1080 K eyboard F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 Removal steps of keyboard 1 Step Screw (quantity) Color T or que 1 M2 × 10 mm, wafer -head, nylon-coated (1) Silver 0.
Lift the keyboard a little in the direction shown by arrow 3 , and then detach the connector 4 . Installation steps of keyboard When installing the keyboar d, do the following: 1.
2. Attach the keyboard so that the keyboard edges a ar e under the fr ame. 3. T o make sure that the fr ont edge of the k eyboard is housed rmly, gently pr ess the keys with your palms and slightly slide the keyboar d towar d you until it snaps int o position.
4. Make sure that the front edge of the k eyboard b is attached rmly . b b b 5. Secure the keyboar d by tight ening the scr ews fr om the bott om side of the computer .
1090 DIMM (in the slot under the keyboard) F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 Note: Y our comput er has two DIMM slots: one under the keyboard and another on the underside of the computer .
1 2 3 2 When installing: Insert the notched end of the DIMM int o the socket. Pr ess the DIMM rmly, and pivot it until it snaps int o place. Make sur e that it is rmly x ed in the slot and does not move easily .
1100 Backup battery F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 Removal steps of backup battery DANGER Use only the battery specied in the parts list for your computer .
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1110 PCI Expr ess Mini C ard for wir eless LAN F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on pag.
3 When installing: • In models with a wireless LAN card that has two antenna connectors, plug the gr ay cable into the jack marked MAIN or M , and the black cable into the jack marked AUX or A on the card.
1120 Keyboard bez el assembly, FPC cable, and Bluethooth daughter card F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1020 Expr essCard blank bezel” on page .
Step Screw (quantity) Color T or que 3 M2 × 3 mm, wafer -head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) 4 Shoulder scr ew (2) Silver 0.181 Nm (1.85 kgfcm) 84 ThinkP ad T420 and T420i Hardware Mai.
7 6 When installing: Make sur e that the connector is attached rmly . Chapter 8 . Removing and replacing a FRU 85.
1 7 1 7 When installing: Make sure that the connectors ar e attached rmly . 1 8 1 9 Step Screw (quantity) Color T or que 13 M2 × 3 mm, wafer -head, nylon-coated (1) Black 0.
2 0 When installing: Make sur e that the connector is attached rmly . Chapter 8 . Removing and replacing a FRU 87.
1130 SmartCard F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 • “1120 Keyboar d be ze.
When installing: Make sur e that the connector is attached rmly . Removal steps of SmartC ard dummy spacer Some models have a SmartCar d dummy spacer as a miscellaneous part. F or those models, r emove the spacer as shown: 1 1 2 Step Screw (quantity) Color T or que 1 M2 × 3 mm, wafer -head, nylon-coated (2) Black 0.
1140 Modem daughter car d (MDC) F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 • “112.
1150 Speak er assembly F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1050 DIMM slot cover” on page 69 • “1080 Keyboard” on page 73 • “1120 Keyboar.
3 3 2 When installing: A ttach the speaker assembly and r oute the cable as shown in the following gure, and make sur e that the speaker connector is attached rmly .
1160 L CD unit F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1020 Expr essCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070.
2 3 Step Screw (quantity) Color T or que 2 M2 × 3 mm, wafer-head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) 6 4 94 ThinkP ad T420 and T420i Hardware Maintenance Manual.
Step Screw (quantity) Color T or que 6 M2.5 × 6 mm, wafer -head, nylon-coated (2) Black 0.392 Nm (4.0 kgfcm) 7 7 8 7 When installing: • Make sur e that you attach the connectors rmly . • Make sur e that you r oute the cables corr ectly and you tape up in the proper positions as shown in the above gur e.
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1170 F an assembly F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1020 Expr essCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “.
1a 1d 1b 1c Step Screw (quantity) Color T or que 1 Capture shoulder scr ew (4) Silver 0.181 Nm (1.85 kgfcm) 2 M2 × 3 mm, wafer -head, nylon-coated (1) black 0.
F or Integreted Graphics models : 2 3 When installing: • Befor e you attach the fan assembly t o the computer , apply thermal grease, at an amount of 0.2 gr ams, on the parts marked a as in the following gures. Either too much or too less application of grease can cause a thermal pr oblem due to imperfect contact with a component.
a • When attaching the fan assembly to the frame, take care not t o damage the heat sink a of the fan assembly . • Make sure that the fan connector is attached rmly .
1180 CPU F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1020 Expr essCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “1070 PCI E.
1190 Base cover assembly and DC-in connector cable F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1020 Expr essCard blank bezel” on page 64 • “1030 Seria.
2 2 2 2 2 2 2 2 3 4 Step Screw (quantity) Color T orque 2 M2 × 5 mm, wafer -head, nylon-coated (8) Black 0.181 Nm (1.85 kgfcm) When installing: Make sur e that the connector is attached rmly . 5 6 When installing: Make sure that the wireless switch is adjusted as shown in callout a .
7 Step Screw (quantity) Color T orque 7 M2 × 3 mm, wafer -head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) Note: Applying labels to the base cover The new base cover FRU is shipped with a kit containing labels of several kinds.
5 Wireless WAN MA C address label 6 China mobile IMEI label 7 China telecom IMEI label 8 SIRM labels (only for Malaysia) 9 Wireless card label (only for Br azil) 10 Anatel label (only for Brazil) 11 M.
1200 Magnesium structure fr ame F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1020 Expr essCard blank bezel” on page 64 • “1030 Serial Ultr abay Enhance.
3 M2 × 8 mm, wafer -head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) 4 Hex stud, nylon-coated (2) Silver 0.392 Nm (4.0 kgfcm) Chapter 8 . Removing and replacing a FRU 107.
1210 System board and ExpressC ard slot assembly F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1020 Expr essCard blank bezel” on page 64 • “1030 Serial .
c Platform Controller Hub (PCH) d Graphic P rocessing Unit (GPU) (Discr ete gr aphics chip) Note: The GPU d is only for models with switchable gr aphics. Models with integr ated gr aphics do not have a GPU on the system boar d. F or Switchable Graphics models: b c a d F or Integrated Gr aphics models: b c a 1 Chapter 8 .
Step Screw (quantity) Color T or que 1 M2 × 3 mm, wafer -head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) 2 When installing: Make sur e that the connector is attached rmly .
Removal steps of mSA T A solid stat e drive 1 Step Screw (quantity) Color T or que 1 M2 × 3 mm, wafer -head, nylon-coated (1) Black 0.181 Nm (1.85 kgfcm) 2 Chapter 8 .
2010 L CD bez el assembly F or access, remove the following FRU: • “1010 Battery pack” on page 63 Removal steps of L CD bez el assembly 1 1 1 1 1 1 2 112 ThinkP ad T420 and T420i Hardwar e Maint.
2020 LED board F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “2010 L CD bez el assembly” on page 112 Removal steps of LED board 1 Step Screw (quantity) Color T or que 1 M2 × 3 mm, at-head, nylon-coated (1) Black 0.
When installing: Make sur e that the connector is attached rmly . 114 ThinkP ad T420 and T420i Hardwar e Maint enance Manual.
2030 Integr ated camer a F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “2010 L CD bez el assembly” on page 112 Removal steps of integrated camer a 1 Step Screw (quantity) Color T or que 1 M2 × 3 mm, at-head, nylon-coated (1) Black 0.
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2040 L CD panel and L CD cable F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1020 Expr essCard blank bezel” on page 64 • “1050 DIMM slot cover” on pag.
7 6 When installing: Make sur e that the connector is attached rmly . 118 ThinkP ad T420 and T420i Hardwar e Maint enance Manual.
2050 Camer a cable F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1020 Expr essCard blank bezel” on page 64 • “1050 DIMM slot cover” on page 69 • “.
2060 Wireless LAN ant enna assembly or wireless LAN/W AN antenna assembly F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1020 Expr essCard blank bezel” on pa.
4 3 3 4 Step Screw (quantity) Color T or que 3 M2 × 3 mm, at-head, nylon-coated (2) Black 0.181 Nm (1.85 kgfcm) 5 5 Chapter 8 . Removing and replacing a FRU 121.
2070 Hinges and L CD rear cover assembly F or access, remove these FRUs in or der: • “1010 Battery pack” on page 63 • “1020 Expr essCard blank bezel” on page 64 • “1050 DIMM slot cover.
Chapter 8 . Removing and replacing a FRU 123.
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Chapter 9. L ocations This chapter presents the locations of ThinkP ad T420 and T420i har dware components. F ront view 1 Integr ated camer a (for some models) 2 ThinkLight 3 Built-in microphone 4 Bui.
1 3 2 3 2 0 4 5 8 6 5 1 2 1 0 1 1 9 1 4 1 6 1 3 1 7 1 5 1 8 1 9 2 1 7 126 ThinkP ad T420 and T420i Hardwar e Maint enance Manual.
Rear view 1 Status indicators Note: F or the description of each indicator , see Chapt er 5 “Status indicators” on page 49 . 2 SmartCard slot 3 DisplayP ort connector 4 USB connector 5 RJ-45 (Ethernet) connector 6 External monitor connector 7 P ower jack 8 USB connector 9 Modem connector or IEEE 1394 5 6 3 2 4 5 7 8 9 1 6 Chapter 9 .
Bottom view 1 Battery pack 2 Battery pack latch 3 DIMM slot 4 Docking connector 5 L CD cover latch 6 Serial Ultrabay Enhanced lock latch 7 Serial Ultrabay Enhanced eject latch 6 7 5 1 2 3 4 128 ThinkP.
Chapter 10. P arts list This chapter contains following lists of the service parts. • “Overall” on page 130 • “L CD FRUs” on page 150 • “Keyboar d” on page 154 • “Miscellaneous p.
Overall 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 3 19 18 20 21 22 23 24 25 26 27 28 29 30 17 16 c a b 130 ThinkP ad T420 and T420i Hardwar e Maint enance Manual.
T able 9. P arts list—Overall No. FRU (Overall) FRU no. CRU ID a - c See “Miscellaneous parts” on page 156. 1 L CD unit (see “L CD FRUs” on page 150 .
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 2 Intel Centrino Ultimate-N 6300 • 4177-CT O , 2Hx, 2Jx, Q8x, QFx • 4178-CT O , 67x, 99x, 9Ax, 9Bx, 9Cx, CBx • 4179-C.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 3 4-GB DDR3-1333 SDRAM SO-DIMM (PC3-10600) card • 4177-CT O , 27x, 29x, 2Ax, 2Bx, 2Cx, 2Hx, 2Jx, 2Kx, 2Lx, 2Mx, 2Nx, 2Px,.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID N9x, NAx, NBx, NFx, P Ax, PBx, PCx, PFx, PGx, PHx, PKx, PLx, PMx, PNx, PPx, PQx, PRx, PSx, PTx, PUx, PVx, PWx, PXx, PYx, PZ.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 8 DVD-RAM/RW drive • 4177-CT O , 22x, 23x, 24x, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx, 2Ex, 2Fx, 2Gx, 2Hx, 2Jx, 2Kx.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 8 T r avel Bez el • 4177-CT O , Q7x, QDx, QFx • 4178-CT O • 4179-CT O • 4180-CT O , LPx, L Qx • 4236-CT O , NDx, .
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 12 I/O sub card (1394 and USB) • 4177-CT O , 2Fx, 2Gx, 2Hx, 2Kx, 2Lx, 2Mx, 2Nx, 2Px, 2Qx, 2Rx, 2Sx, 2Tx, 2Ux, 2Vx, 2Wx, 2.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID L7x, L8x, L9x, LAx, LBx, L Cx, LDx, LEx, LFx, L Gx, LHx, LJx, LKx, LLx, LMx, LNx, LPx, L Qx, LRx, LSx, L Tx, LUx, L Vx, L W.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 15 Slice batt ery • 4177-CT O • 4178-CT O • 4179-CT O • 4180-CT O • 4236-CT O • 4237-CT O • 4238-CT O 42T4739.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 17 Integr ated China T elecom Mobile Broadband (Huawei EM660) • 4177-CT O • 4178-CT O • 4179-CT O • 4180-CT O • 4.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 19 SA T A hard disk drive, 160 GB, 7200 rpm • 4177-CT O • 4178-CT O • 4179-CT O • 4180-CT O • 4236-CT O • 4237-.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 19 Solid state drive, 128 GB • 4177-CT O , Q7x • 4178-CT O , 5Rx, A Tx, B7x, CUx • 4179-CT O • 4180-CT O , KAx, L3x.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 21 System board assembly, integr ated graphics, non-AMT , TPM • 4177-CT O , 25x, 26x, 27x, 28x, 29x, 2Dx, 2Ex, 2Qx, 2Rx, .
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 21 System board assembly, discret e gr aphics, non-AMT , TPM • 4177-CT O , 22x, 23x, 24x, 2Ax, 2Bx, 2Cx, 2Kx, 2Lx, 2Mx, 2.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 22 CPU assembly, i7-2620M (2.70 GHz) • 4177-CT O , 2Hx, 2Jx, Q7x, QAx, QBx, QFx • 4178-CT O , 5Xx, 5Yx, 67x, 6Ax, 6Gx, .
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 22 CPU assembly, Intel P entium B950 (2.10 GHz) • 4177-CT O , GFx, GKx, GLx, GMx • 4178-CT O • 4179-CT O • 4180-CT O • 4236-CT O • 4237-CT O • 4238-CT O 04W1895 N 22 CPU assembly, Intel P entium B940 (2.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 26 F an assembly, integr ated • 4177-CT O , 25x, 26x, 27x, 28x, 29x, 2Dx, 2Ex, 2Fx, 2Gx, 2Hx, 2Qx, 2Rx, 2Sx, 35x, 36x, GK.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID 27 FPC cable (touch pad with ngerprint r eader and Bluetooth) • 4177-CT O , 22x, 23x, 24x, 27x, 29x, 2Ax, 2Bx, 2Cx, 2D.
T able 9. P arts list—Overall (continued) No. FRU (Overall) FRU no. CRU ID • 4236-CT O , MBx, N2x, N3x, N4x, N5x, N6x, N7x, N8x, N9x, NAx, NBx, NCx, NDx, NEx, NFx, NGx, NHx, NKx, NLx, NMx, NNx, NP.
L CD FRUs 1 2 3 4 5 6 7 8 9 10 T able 10. Parts list—L CD FRUs No. FRU FRU no. CRU ID a, b See “Miscellaneous parts” on page 156 . 1 L CD bez el assembly 04W1609 N 150 ThinkP ad T420 and T420i H.
T able 10. P arts list—L CD FRUs (continued) No. FRU FRU no. CRU ID 2 Camer a module • 4177-CT O , 22x, 23x, 24x, 25x, 26x, 27x, 28x, 29x, 2Ax, 2Bx, 2Cx, 2Dx, 2Ex, 2Fx, 2Gx, 2Hx, 2Jx, 2Kx, 2Lx, 2M.
T able 10. P arts list—L CD FRUs (continued) No. FRU FRU no. CRU ID 3 L CD module, 14.0-inch HD (1366 x 768) LED backlight Anti-Glare Display • 4177-CT O , 25x, 26x, 27x, 28x, 2Dx, 2Jx, 2Mx, 2Rx, .
T able 10. P arts list—L CD FRUs (continued) No. FRU FRU no. CRU ID 8 L CD cable (for 14.0-inch HD L CD module) • 4177-CT O , 25x, 26x, 27x, 28x, 2Dx, 2Jx, 2Mx, 2Rx, 2Sx, 2Tx, 2Ux, 2Vx, 2Wx, 32x, .
K eyboard T able 11. Parts list—K eyboard Language FRU no. CRU ID Arabic 45N2076 45N2146 45N2216 Belgian 45N2077 45N2147 45N2217 Brazilian P ortuguese 45N2075 45N2145 45N2215 Bulgarian 45N2078 45N21.
T able 11. P arts list—Keyboard (continued) Language FRU no. CRU ID Netherlands 45N2090 45N2160 45N2230 T urkish (F T ype) 60Y9552 60Y9554 60Y9550 Chapter 10 .
Miscellaneous parts T able 12. P arts list—Miscellaneous parts FRU FRU no. CRU ID Screw and seal kit: • M2 × 3 mm, black (50) • M2 × 5 mm, black (20) • M2 × 8 mm, black (15) • M2 × 10 mm, Silver (4) • M2 × 15 mm, black (8) • M2.5 × 4 mm, black (8) • M2.
T able 12. Parts list—Miscellaneous parts (continued) FRU FRU no. CRU ID • Insulation sheet - ngerprint • LCD latch left • LCD latch right • LCD link • LCD latch spring System miscellan.
Information about ac power adapters T able 13. Parts list—2-pin ac power adapt ers FRU FRU no. CRU ID 2-pin (65 W , 20 V) adapter (models C T O, xxE, xxF , xxJ, xxL, xxP , xxS, xxU, xxY) 42T5282 2-p.
P ower cor ds A ThinkP ad power cord for a specic country or r egion is usually available only in that country or r egion: T able 15. P arts list—2-pin power cords Country or region FRU no. CRU ID Argentina • models -C TO , xxY 42T5020 42T5105 Brazil • models -C TO , xxP 42T5180 42T5183 Canada, U .
Recovery discs Windows XP Professional DVDs Note: The Windows XP P rofessional r ecovery DVDs are available only for models with a valid Microsoft Windows XP P rofessional certicate of authenticity (CO A) afxed to the system.
Windows Vista Home Basic (32 bit) SP2 DVDs Note: The Windows Vista recovery DVDs are available only for models with a valid Micr osoft Windows Vista certicate of authenticity (COA) afxed to the syst em.
QXx, Q Yx, R2x, R3x, R4x, R8x, R9x, RAx, RBx, RCx, RDx, RFx, RGx, RJx, RKx, RLx, RMx, RNx, RPx, RQx, RRx, RTx, RVx, RWx, RXx, RYx • 4178-C T O, 52x, 53x, 54x, 55x, 56x, 57x, 58x, 59x, 5Ax, 5Bx, 5Cx,.
T able 21. P arts list—Windows 7 Professional (64 bit) recovery DVDs (continued) Language P/N CRU ID Serbian-Latin with English 04T1342 Simplied Chinese 04T1324 T r aditional Chinese with English (Hong Kong S.
T able 23. Parts list—Windows 7 Home Premium (32 bit) recovery DVDs Language P/N CRU ID English (for India) 04T1362 Simplied Chinese 04T1361 US English 04T1363 * Windows 7 Home Premium (64 bit) D.
T able 24. P arts list—Windows 7 Home P remium (64 bit) recovery DVDs (continued) Language P/N CRU ID T urkish with English 04T1384 US English (Disabled) 04T1385 US English 04T1386 Windows 7 Ultimat.
Common service tools T able 27. Parts list—Common service tools T ool P/N Screwdriver kit 95F3598 1/4" drive spinner handle 1650840 1/4" Sq. to 1/4" hex t orx adapter 93F2838 TR7- TR-10 tamper resistant t orx bits 00P6967 Removal tool antenna RF connector 08K7159 USB 2.
Appendix A. Notices Lenovo may not offer the pr oducts, services, or features discussed in this document in all countries. Consult your local Lenovo repr esentative for information on the pr oducts and services currently available in your area.
Electronic emissions notices F or electr onic emission information on Class B digital devices, r efer to the corr esponding information in the User Guide .
T r ademarks The following t erms ar e trademarks of L enovo in the United States, other countries or both: Active Pr otection System Lenovo ThinkLight ThinkP ad ThinkV antage T rackP oint Ultrabay Th.
170 ThinkP ad T420 and T420i Hardwar e Maint enance Manual.
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Part Number: 0A60007_03 (1P) P/N: 0A60007_03 *0A60007_03*.
An important point after buying a device Lenovo T420 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Lenovo T420 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Lenovo T420 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Lenovo T420 you will learn all the available features of the product, as well as information on its operation. The information that you get Lenovo T420 will certainly help you make a decision on the purchase.
If you already are a holder of Lenovo T420, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Lenovo T420.
However, one of the most important roles played by the user manual is to help in solving problems with Lenovo T420. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Lenovo T420 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
