1160 System Board Assembly And Fan Assembly - Lenovo 1141BTU Hardware Maintenance Manual

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1160 System board assembly and fan 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 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 54
"1020 ExpressCard blank bezel" on page 55
"1030 Bottom slot cover" on page 56
"1040 Optical drive or travel cover" on page 57
"1060 Hard disk drive assembly" on page 59
"1070 PCI Express Mini Card for wireless LAN" on page 61
"1080 PCI Express Mini Card for wireless WAN" on page 62
"1080 mSATA solid state drive" on page 63
"1090 Backup battery" on page 64
"1110 Keyboard" on page 65
"1120 Top case assembly" on page 66
"1130 Bluetooth daughter card" on page 69
"1140 Express sub card" on page 70
"1150 Speaker assembly" on page 71
.
Chapter 8
Removing and replacing a FRU
73

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