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Contents
About this manual. . . . . . . . . . .
iii
Screw notices . . . . . . . . . . . . . . .
41
Chapter 1. Safety information . . . . . . 1
Chapter 7. Removing and replacing a
General safety . . . . . . . . . . . . . . . .
1
FRU . . . . . . . . . . . . . . . . . .
43
Electrical safety . . . . . . . . . . . . . . .
2
General guidelines . . . . . . . . . . . . .
43
Safety inspection guide . . . . . . . . . . . .
3
1010 Battery pack . . . . . . . . . . . . .
44
Handling devices that are sensitive to electrostatic
1020 Bottom slot cover . . . . . . . . . . .
44
discharge. . . . . . . . . . . . . . . . . .
3
1030 Hard disk drive . . . . . . . . . . . .
45
Grounding requirements . . . . . . . . . . . .
4
1040 Optical drive . . . . . . . . . . . . .
47
Safety notices (multilingual translations) . . . . . .
4
1050 Memory modules . . . . . . . . . . .
47
Laser compliance statement (multilingual
1060 PCI Express Mini Card for wireless LAN . .
48
translations) . . . . . . . . . . . . . . . .
19
1070 Backup battery . . . . . . . . . . . .
49
Chapter 2. Important service
1080 Keyboard . . . . . . . . . . . . . .
50
information . . . . . . . . . . . . . .
27
1090 Keyboard bezel . . . . . . . . . . . .
52
Strategy for replacing FRUs . . . . . . . . .
27
1100 LED board and power board . . . . . . .
55
Strategy for replacing a hard disk drive . . .
28
1110 Microphone assembly . . . . . . . . .
56
Important notice for replacing a system
1120 I/O board
. . . . . . . . . . . . . .
56
board . . . . . . . . . . . . . . . .
28
1130 System board assembly. . . . . . . . .
58
Important information about replacing RoHS
1140 LCD unit . . . . . . . . . . . . . . .
60
compliant FRUs . . . . . . . . . . . . . .
28
1150 Thermal fan assembly
. . . . . . . . .
62
1160 Speaker assembly . . . . . . . . . . .
65
Chapter 3. General checkout . . . . .
29
1170 DC-in sub card and base cover . . . . . .
65
What to do first . . . . . . . . . . . . . .
29
2010 LCD front bezel . . . . . . . . . . . .
67
Power system checkout . . . . . . . . . . .
30
2020 Integrated camera . . . . . . . . . . .
69
Checking the ac power adapter . . . . . .
30
2030 LCD panel, LCD cable, and hinges
. . . .
70
Checking operational charging
. . . . . .
31
2040 Antenna assembly . . . . . . . . . . .
72
Checking the battery pack . . . . . . . .
31
Chapter 8. Locations . . . . . . . . .
75
Chapter 4. Related service
Front view . . . . . . . . . . . . . . . .
75
information . . . . . . . . . . . . . .
33
Bottom view
. . . . . . . . . . . . . . .
76
Recovering the computer settings . . . . . . .
33
Passwords . . . . . . . . . . . . . . . .
33
Chapter 9. Parts list . . . . . . . . . .
77
Power-on password . . . . . . . . . . .
34
Overall . . . . . . . . . . . . . . . . . .
78
Supervisor password . . . . . . . . . .
34
LCD FRUs . . . . . . . . . . . . . . . .
80
Power management
. . . . . . . . . . . .
34
Keyboard . . . . . . . . . . . . . . . . .
82
Screen blank mode . . . . . . . . . . .
34
Miscellaneous parts
. . . . . . . . . . . .
85
Sleep mode . . . . . . . . . . . . . .
34
ac power adapters . . . . . . . . . . . . .
85
Hibernation mode
. . . . . . . . . . .
35
Power cords
. . . . . . . . . . . . . . .
85
Chapter 5. Lenovo B475e . . . . . . .
37
Appendix A. Notices . . . . . . . . . .
91
Specifications . . . . . . . . . . . . . . .
37
Electronic emissions notices . . . . . . . . .
92
Status indicators . . . . . . . . . . . . . .
38
Trademarks . . . . . . . . . . . . . . . .
92
Fn key combinations . . . . . . . . . . . .
39
Chapter 6. FRU replacement
notices . . . . . . . . . . . . . . . .
41
© Copyright Lenovo 2012
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