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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 statements (multilingual
translations) . . . . . . . . . . . . . . . . 17
Chapter 2. Important service
information . . . . . . . . . . . . . . 25
Strategy for replacing FRUs . . . . . . . . . 25
Strategy for replacing a hard disk drive . . . 25
Important notice for replacing a system
board . . . . . . . . . . . . . . . . 26
How to use error codes . . . . . . . . . 26
Strategy for replacing FRUs for CTO, CMV, and
GAV . . . . . . . . . . . . . . . . . . . 26
Product denition. . . . . . . . . . . . 26
FRU identication for CTO, CMV, and GAV
products . . . . . . . . . . . . . . . 27
Chapter 3. General checkout . . . . . 29
What to do rst . . . . . . . . . . . . . . 29
Checkout guide . . . . . . . . . . . . . . 31
System supporting the Lenovo ThinkVantage
Toolbox program and the PC-Doctor for DOS
diagnostics program . . . . . . . . . . 31
System supporting the Lenovo diagnostics
programs . . . . . . . . . . . . . . . 35
Power system checkout . . . . . . . . . . . 37
Checking the ac power adapter . . . . . . 37
Checking operational charging . . . . . . 38
Checking the battery pack . . . . . . . . 38
Checking the backup battery . . . . . . . 39
Chapter 4. Related service
information . . . . . . . . . . . . . . 41
Restoring the factory contents by using Recovery
Disc Set . . . . . . . . . . . . . . . . . 41
Passwords . . . . . . . . . . . . . . . . 42
Power-on password . . . . . . . . . . . 42
Hard-disk password. . . . . . . . . . . 42
Supervisor password . . . . . . . . . . 43
How to remove the power-on password . . . 43
How to remove the hard-disk password . . . 43
Power management . . . . . . . . . . . . 44
Screen blank mode . . . . . . . . . . . 44
Sleep (standby) mode . . . . . . . . . . 44
Hibernation mode . . . . . . . . . . . 45
Symptom-to-FRU index . . . . . . . . . . . 45
Numeric error codes . . . . . . . . . . 46
Error messages . . . . . . . . . . . . 47
Beep symptoms . . . . . . . . . . . . 48
No-beep symptoms . . . . . . . . . . . 48
LCD-related symptoms . . . . . . . . . 49
Intermittent problems . . . . . . . . . . 49
Undetermined problems . . . . . . . . . 49
Chapter 5. Installing and conguring
RAID . . . . . . . . . . . . . . . . . . 51
Supported RAID levels . . . . . . . . . . . 51
Conguring the system UEFI BIOS to enable
embedded SATA RAID functionality . . . . . . 51
Creating RAID volumes . . . . . . . . . . . 52
Deleting RAID volumes . . . . . . . . . . . 52
Chapter 6. Status indicators . . . . . 53
Chapter 7. Fn key combinations . . . 57
Chapter 8. FRU replacement
notices . . . . . . . . . . . . . . . . 61
Screw notices . . . . . . . . . . . . . . . 61
Retaining serial numbers. . . . . . . . . . . 62
Restoring the serial number of the system
unit . . . . . . . . . . . . . . . . . 62
Retaining the UUID . . . . . . . . . . . 63
Reading or writing the ECA information . . . 63
Chapter 9. Removing and replacing a
FRU . . . . . . . . . . . . . . . . . . 65
Before servicing ThinkPad T520, T520i, and
W520 . . . . . . . . . . . . . . . . . . 66
1010 Battery pack . . . . . . . . . . . . . 66
1020 Serial Ultrabay Enhanced device or travel
bezel . . . . . . . . . . . . . . . . . . 67
1030 DIMM slot cover. . . . . . . . . . . . 68
1040 DIMM (bottom slot). . . . . . . . . . . 69
1050 Hard disk drive slot cover, hard disk drive
(HDD) and HDD rubber rails or solid state drive
(SSD) and storage converter . . . . . . . . . 71
1060 Keyboard . . . . . . . . . . . . . . 72
1070 DIMM (upper slot) . . . . . . . . . . . 76
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