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Lenovo ThinkPad T420s T420si

Tags : LenovoThinkPadT420sT420si4170417141724173417441754176 
Lenovo ThinkPad T420s T420si Hardware Maintenance Manual

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Description

Lenovo ThinkPad T420s T420si Hardware Maintenance Manual
Seventh Edition (June 2013) - 152 pages

This manual contains service and reference information for the following ThinkPad® products.

ThinkPad T420s and T420si Machine types (MT) 4170, 4171, 4172, 4173, 4174, 4175, and 4176

Use this manual along with the advanced diagnostic tests to troubleshoot problems.

Contents
About this manual. . . . . . . . . . . iii
Chapter 1. Safety information . . . . . . 1
General safety . . . . . . . . . . . . . . . . 1
Electrical safety . . . . . . . . . . . . . . . 2
Safety inspection guide . . . . . . . . . . . . 3
Handling devices that are sensitive to electrostatic
discharge. . . . . . . . . . . . . . . . . . 3
Grounding requirements . . . . . . . . . . . . 4
Safety notices (multilingual translations) . . . . . . 4
Laser compliance statement (multilingual
translations) . . . . . . . . . . . . . . . . 24
Chapter 2. Important service
information . . . . . . . . . . . . . . 31
Strategy for replacing FRUs . . . . . . . . . 31
Strategy for replacing a hard disk drive . . . 32
Important notice for replacing a system
board . . . . . . . . . . . . . . . . 32
How to use error message . . . . . . . . 32
Strategy for replacing FRUs for CTO, CMV, and
GAV . . . . . . . . . . . . . . . . . . . 32
Product definition . . . . . . . . . . . . 32
FRU identification for CTO, CMV, and GAV
products . . . . . . . . . . . . . . . 33
Chapter 3. General checkout . . . . . 35
What to do first . . . . . . . . . . . . . . 35
Checkout guide . . . . . . . . . . . . . . 36
System supporting the Lenovo ThinkVantage
Toolbox program and the PC-Doctor for DOS
diagnostics program . . . . . . . . . . 36
System supporting the Lenovo diagnostics
programs . . . . . . . . . . . . . . . 40
Power system checkout . . . . . . . . . . . 42
Checking the ac power adapter . . . . . . 43
Checking operational charging . . . . . . 44
Checking the battery pack . . . . . . . . 44
Checking the backup battery . . . . . . . 44
Chapter 4. Related service
information . . . . . . . . . . . . . . 47
Restoring the factory contents by using Product
Recovery discs . . . . . . . . . . . . . . 47
Restoring the factory contents by using Recovery
Disc Set . . . . . . . . . . . . . . . . . 47
Passwords . . . . . . . . . . . . . . . . 49
Power-on password . . . . . . . . . . . 49
Hard disk password . . . . . . . . . . . 49
Supervisor password . . . . . . . . . . 49
How to remove the power-on password . . . 49
How to remove the hard disk password . . . 50
Power management . . . . . . . . . . . . 50
Screen blank mode . . . . . . . . . . . 50
Sleep (standby) mode . . . . . . . . . . 51
Hibernation mode . . . . . . . . . . . 51
Symptom-to-FRU index . . . . . . . . . . . 52
Numeric error codes . . . . . . . . . . 53
Error messages . . . . . . . . . . . . 54
Beep symptoms . . . . . . . . . . . . 54
No-beep symptoms . . . . . . . . . . . 55
LCD-related symptoms . . . . . . . . . 55
Intermittent problems . . . . . . . . . . 56
Undetermined problems . . . . . . . . . 56
Chapter 5. Status indicators . . . . . 57
Chapter 6. Fn key combinations . . . 61
Chapter 7. FRU replacement
notices . . . . . . . . . . . . . . . . 63
Screw notices . . . . . . . . . . . . . . . 63
Retaining serial numbers. . . . . . . . . . . 64
Restoring the serial number of the system
unit . . . . . . . . . . . . . . . . . 64
Retaining the UUID . . . . . . . . . . . 65
Reading or writing the ECA information . . . 65
Chapter 8. Removing and replacing a
FRU . . . . . . . . . . . . . . . . . . 67
Before servicing ThinkPad T420s and T420si
models. . . . . . . . . . . . . . . . . . 67
1010 Battery pack . . . . . . . . . . . . . 68
1020 Serial Ultrabay Slim device or travel bezel . . 69
1030 Solid-state drive (SSD) or hard disk drive
(HDD) . . . . . . . . . . . . . . . . . . 70
1040 DIMM . . . . . . . . . . . . . . . . 72
1050 PCI Express Mini Card for wireless LAN . . 74
1060 PCI Express Mini Card for wireless WAN . . 77
1070 4–in–1 media card reader . . . . . . . . 79
1080 Keyboard . . . . . . . . . . . . . . 80
1090 Backup battery . . . . . . . . . . . . 83
1100 Palm rest with fingerprint reader, smart card
reader, and speaker. . . . . . . . . . . . . 84
1110 LCD unit . . . . . . . . . . . . . . . 88
1120 DC-in sub card . . . . . . . . . . . . 90
1130 Bluetooth daughter card (BDC-3.0) . . . . 91
1140 Bluetooth-wireless radio switch FPC . . . . 91
1150 System board, fan assembly, 34-mm
ExpressCard reader, and base cover . . . . . . 93
1160 mSATA . . . . . . . . . . . . . . . 99
2010 LCD bezel assembly . . . . . . . . . . 101
2020 LCD panel . . . . . . . . . . . . . . 102
2030 Integrated camera, microphone, or hall
sensor card . . . . . . . . . . . . . . . . 104
2040 LED sub card . . . . . . . . . . . . . 106
2050 LCD cable . . . . . . . . . . . . . . 107
2060 Hinge kit . . . . . . . . . . . . . . . 108
2070 LED cable . . . . . . . . . . . . . . 110
2080 Antenna kit and LCD rear cover assembly . . 111
Chapter 9. Locations . . . . . . . . 115
Front view . . . . . . . . . . . . . . . . 115
Rear view. . . . . . . . . . . . . . . . . 116
Bottom view . . . . . . . . . . . . . . . 116
Chapter 10. Parts list . . . . . . . . 117
Overall . . . . . . . . . . . . . . . . . . 118
LCD FRUs . . . . . . . . . . . . . . . . 128
Keyboard . . . . . . . . . . . . . . . . . 132
Miscellaneous parts . . . . . . . . . . . . 133
ac power adapter . . . . . . . . . . . . . 134
Power cords . . . . . . . . . . . . . . . 134
Recovery discs . . . . . . . . . . . . . . 135
Windows XP Professional (32 bit) DVDs . . . 135
Windows Vista Home Basic (32 bit) DVDs . . 136
Windows Vista Business (32 bit) DVDs . . . 136
Windows 7 Home Basic (32 bit) DVDs. . . . 137
Windows 7 Home Basic (64 bit) DVDs. . . . 137
Windows 7 Ultimate (32 bit) DVDs . . . . . 138
Windows 7 Ultimate (64 bit) DVDs . . . . . 138
Windows 7 Home Premium (32 bit) DVDs . . 138
Windows 7 Home Premium (64 bit) DVDs . . 139
Windows 7 Professional (32 bit) DVDs. . . . 139
Windows 7 Professional (64 bit) DVDs. . . . 140
Windows 7 Professional (32 bit) Rapid Boot
DVDs . . . . . . . . . . . . . . . . 141
Common service tools . . . . . . . . . . . 142
Appendix A. Notices . . . . . . . . . 143
Electronic emissions notices . . . . . . . . . 144
Trademarks . . . . . . . . . . . . . . . . 144



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