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Removing and replacing a FRU
1200 System board, PC Card/ExpressCard slots assembly and
interposer card
For access, remove these FRUs, in order:
v "1010 Battery pack" on page 57
v "1020 Ultrabay Slim device" on page 58
v "1030 Hard disk drive cover, hard disk drive, and hard disk drive rubber rails"
v "1040 Palm rest or palm rest with fingerprint reader" on page 61
v "1050 DIMM" on page 65
v "1060 Keyboard" on page 66
v "1070 Modem daughter card (MDC-1.5)" on page 68
v "1080 PCI Express Mini Card for wireless LAN" on page 70
v "1090 PCI Express Mini Card for wireless WAN" on page 72
v "1110 SIM card slot" on page 75
v "1120 Keyboard bezel" on page 76
v "1130 Fan assembly" on page 78
v "1140 CPU" on page 81
v "1150 LCD assembly" on page 82
v "1160 Base cover" on page 85
v "1190 Structure frame" on page 94
98
MT 8889, 8890, 8891, 8892, 8893, 8894, 8895, 8896, 8897, 8898, 8899, 8900, 8938, and 8939
Important notices for handling the system board
When handling the system board, bear the following in mind.
v At every point in the process, be sure not to drop or stack the system
board.
v The system board has an accelerometer, which can be broken by applying
several thousands of G-forces.
Note: Dropping a system board from a height of as little as 6 inches so
that it falls flat on a hard bench can subject the accelerometer to as
much as 6,000 G's of shock.
v Be careful not to drop the system board on a bench top that has a hard
surface, such as metal, wood, or composite.
v If a system board is dropped, you must test it, using PC-Doctor for DOS, to
make sure that the HDD Active Protection still functions (see below).
Note: If the test shows that HDD Active Protection is not functioning, be
sure to document the drop in any reject report, and replace the
system board.
v Avoid rough handling of any kind.
v If you put a system board down, be sure to put it only on a padded
surface such as an ESD mat or conductive corrugated material.
After replacing the system board, run PC-Doctor for DOS to make sure that
HDD Active Protection still functions. The procedure is as follows:
1. Place the computer on a horizontal surface.
2. Run Diagnostics --> ThinkPad Devices --> HDD Active Protection Test.
Attention: Do not apply physical shock to the computer while the test is
running.
on page 59
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