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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 a 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 63
• "1020 Hard disk drive (HDD) and solid state drive (SSD)" on page 63
•
"1030 DIMM" on page 65
•
"1040 Keyboard" on page 67
•
"1050 Palm rest or palm rest with a fingerprint reader" on page 69
•
"1070 Backup battery" on page 73
• "1060 PCI Express Mini Card for wireless LAN/WiMAX" on page 71
•
"1080 PCI Express Mini Card for wireless WAN" on page 74
•
"1090 Keyboard bezel" on page 76
•
"1100 LCD assembly" on page 77
•
"1110 Base cover assembly and speaker assembly" on page 80
Table 21. Removal steps of system board, DC-in connector, fan, and ExpressCard slot assembly
The following components soldered on the system board are extremely sensitive. When you service the system
board, avoid any kind of rough handling.
.
Chapter 8
Removing and replacing a FRU
85
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