IBM X121E manual System board assembly, fan assembly, and backup battery

1130 System board assembly, fan assembly, and backup battery

Important notices for handling the system board:

When handling the system board, bear the following in mind.

•The system board has an accelerometer, which can be broken if several thousands of G-forces are applied.

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.

•Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or composite.

•If a system board is dropped, you must test it, using PC-Doctor for DOS, to make sure that the HDD Active Protection System™ still functions.

Note: If the test shows that the HDD Active Protection System is not functioning, be sure to document the drop in any reject report, and replace the system board.

•Avoid rough handling of any kind.

•At every point in the process, be sure not to drop or stack the system board.

•If you put a system board down, be sure to put it only on a padded surface such as an ESD mat or a corrugated conductive surface.

After replacing the system board, run PC-Doctor for DOS to make sure that the HDD Active Protection System 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.

For access, remove these FRUs in order:

•“1010 Battery pack” on page 50

•“1020 Bottom slot cover” on page 51

•“1040 Hard disk drive or solid state drive assembly” on page 53

•“1070 Keyboard” on page 57

•“1090 Top case assembly” on page 60

•“1100 Bluetooth daughter card” on page 62

Table 23. Removal steps of system board

Chapter 8. Removing and replacing a FRU 65