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2020 System board assembly
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 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 at 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 57
• “1020 ExpressCard blank bezel and Media Card blank bezel” on page 58
• “1030 Optical drive or travel cover” on page 60
• “1040 Thermal cover” on page 61
• “1050 Hard disk drive or solid state drive assembly” on page 62
• “1060 DIMM” on page 65
• “1070 Fan assembly” on page 66
• “1080 CPU” on page 68
• “1090 SIM slot cover” on page 69
• “1110 Wireless WAN slot cover and PCI Express Mini Card for wireless WAN” on page 71
• “1110 mSATA solid state drive” on page 73
• “1120 Palm rest assembly with cables” on page 74
• “1130 PCI Express Mini Card for wireless LAN” on page 78
• “1140 Backup battery” on page 80
• “1150 Bluetooth daughter card ” on page 80
• “1160 Media Card Reader slot board and Media Card Reader cable assembly” on page 81
• “1170 Keyboard” on page 83
• “1180 Keyboard bezel” on page 85
• “1190 LCD unit” on page 87
• “2010 Top shielding assembly” on page 90
Chapter 8. Removing and replacing a FRU 93