Lenovo ThinkPad X100e Hardware Maintenance Manual page 81

• 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.
If the system supports PC-Doctor for DOS, 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.
Note: The fan assembly and the backup battery are attached to the system board.
For access, remove these FRUs in order:
• "1010 Battery pack" on page 54
• "1020 Bottom door" on page 55
• "1030 Hard disk drive (HDD)" on page 58
• "1080 Keyboard" on page 64
• "1090 Palm rest assembly, power-on board assembly (with cable), and microphone" on page 67
• "1100 CRT board assembly (with cable)" on page 71
• "1110 Speaker assembly" on page 72
• "1120 I/O board (for ThinkPad X120e)" on page 73
Location of major sensitive components on the system board
Following components soldered on the top side of the system board are extremely sensitive. When you
service the system board, avoid any kind of rough handling.
For ThinkPad X100e
a
Accelerometer chip for the HDD Active Protection System™
b
North Bridge
c
CPU
d
South Bridge
.
Chapter 8 Removing and replacing a FRU
75