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Lenovo ThinkPad W541 (English) Hardware Maintenance Manual - ThinkPad T540p, W - Page 4

AppendixA.Notices, AppendixB.Abbreviation table .. 107, Camera-and-microphone card - keyboard

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Page 4 highlights

Before servicing the computer 58 Removing the SIM card 58 1010 Battery pack 58 1020 ExpressCard reader or dummy ExpressCard 59 1030 Large bottom door 60 1040 Hard disk drive or solid-state drive . . . . 60 1050 Optical drive 61 1060 Memory module 62 1070 Small bottom door 63 1080 Wireless LAN card 64 1090 Wireless WAN card or M.2 solid-state drive . 65 1100 Coin-cell battery 67 1110 Keyboard 68 1120 Keyboard bezel assembly 73 1130 Power button card, color sensor, NFC card, fingerprint reader, and trackpad 75 1140 Smart card reader or dummy smart card . . 80 1150 LCD unit 82 1160 Magnesium structure frame 85 1170 Speaker assembly 86 1180 dc-in cable assembly 87 1190 Thermal fan assembly 88 1200 USB card 90 1210 Microprocessor 90 1220 System board and base cover 91 2010 LCD front bezel 94 2020 LCD panel, hinges, and LCD cable . . . . 95 2030 Camera-and-microphone card and camera-and-microphone cable 100 2040 Antenna kit and LCD rear cover assembly . . 101 Appendix A. Notices 105 Electronic emissions notices 106 Trademarks 106 Appendix B. Abbreviation table . . . 107 ii Hardware Maintenance Manual

Section	Page
About this manual	5
Chapter 1. Safety information	7
General safety	7
Electrical safety	7
Safety inspection guide	8
Handling devices that are sensitive to electrostatic discharge	9
Grounding requirements	10
Safety notices (multilingual translations)	10
Chapter 2. Important service information	25
Strategy for replacing FRUs	25
Strategy for replacing a hard disk drive or a solid-state drive	25
Important notice for replacing a system board	26
How to use error message	26
Strategy for replacing FRUs for CTO, special-bid, and standard models	26
Product definition	26
FRU identification	26
Chapter 3. General checkout	29
What to do first	29
Checkout guide	30
Lenovo Solution Center	30
Quick test programs	30
UEFI diagnostic program	31
Bootable diagnostic programs	31
Power system checkout	32
Checking the ac power adapter	33
Checking the battery and operational charging	33
Checking the coin-cell battery	34
Chapter 4. Related service information	35
Restoring the factory contents by using the Recovery Disc Set	35
Using the Windows recovery solutions (for Windows 8 and Windows 8.1 only)	36
Refreshing your computer	36
Resetting your computer to the factory default settings	37
Using the advanced startup options	37
Using the Windows recovery environment	38
Creating and using recovery media	38
Passwords	39
Power-on password	39
Hard disk password	39
Supervisor password	40
How to remove the power-on password	40
How to remove the hard disk password	40
Power management	41
Screen blank mode (for Windows 7 only)	41
Sleep mode	41
Hibernation mode	42
Symptom-to-FRU index	42
Numeric error codes	43
Error messages	44
Beep symptoms	44
No-beep symptoms	45
LCD-related symptoms	45
Intermittent problems	45
Undetermined problems	46
Chapter 5. Status indicators	47
Chapter 6. Function keys	49
Chapter 7. Locations	51
Locating computer controls, connectors, and indicators	51
Front view	51
Rear view	52
Bottom view	52
Locating FRUs and CRUs	53
Major FRUs	54
LCD FRUs	56
Miscellaneous parts and other FRUs	57
Looking up FRU information	57
Chapter 8. FRU replacement notices	59
Screw notices	59
Retaining serial numbers	60
Restoring the serial number of the system unit	60
Retaining the UUID	61
Reading or writing the ECA information	61
Chapter 9. Removing or replacing a FRU	63
General guidelines	63
Common service tools	64
Before servicing the computer	64
Removing the SIM card	64
1010 Battery pack	64
1020 ExpressCard reader or dummy ExpressCard	65
1030 Large bottom door	66
1040 Hard disk drive or solid-state drive	66
1050 Optical drive	67
1060 Memory module	68
1070 Small bottom door	69
1080 Wireless LAN card	70
1090 Wireless WAN card or M.2 solid-state drive	71
1100 Coin-cell battery	73
1110 Keyboard	74
1120 Keyboard bezel assembly	79
1130 Power button card, color sensor, NFC card, fingerprint reader, and trackpad	81
1140 Smart card reader or dummy smart card	86
1150 LCD unit	88
1160 Magnesium structure frame	91
1170 Speaker assembly	92
1180 dc-in cable assembly	93
1190 Thermal fan assembly	94
1200 USB card	96
1210 Microprocessor	96
1220 System board and base cover	97
2010 LCD front bezel	100
2020 LCD panel, hinges, and LCD cable	101
2030 Camera-and-microphone card and camera-and-microphone cable	106
2040 Antenna kit and LCD rear cover assembly	107
Appendix A. Notices	111
Electronic emissions notices	112
Trademarks	112