Lenovo 057829U User Manual - Page 120
System board assembly, Important notices for handling the system board, Diagnostics
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1180 System board assembly Important notices for handling the system board: When handling the system board, bear the following in mind. v 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 flat on a hard bench can subject the accelerometer to as much as 6,000 G's of shock. v Be careful not to drop the system board on a bench top that has a hard surface, such as metal, wood, or composite. v If a system board is dropped, you must test it, using PC-Doctor for DOS, to make sure that the HDD Active Protection SystemTM still functions (see below). Note: If the test shows that HDD Active Protection System is not functioning, be sure to document the drop in any reject report, and replace the system board. v Avoid rough handling of any kind. v At every point in the process, be sure not to drop or stack the system board. v 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. After replacing the system board, run PC-Doctor for DOS to make sure that 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: v "1010 Battery pack" on page 78 v "1020 ExpressCard blank bezel" on page 79 v "1030 Optical drive or travel cover" on page 80 v "1040 Thermal cover" on page 81 v "1050 Hard disk drive (HDD) assembly" on page 82 v "1060 DIMM" on page 84 v "1070 Fan assembly" on page 85 v "1080 CPU" on page 89 v "1090 Wireless WAN slot cover and PCI Express Mini Card for wireless WAN" on page 90 v "1100 Palm rest assembly with cables" on page 93 v "1110 PCI Express Mini Card for wireless LAN" on page 96 v "1120 Backup battery" on page 98 v "1130 Bluetooth daughter card (BDC-2)" on page 99 v "1140 Keyboard" on page 100 v "1150 Keyboard bezel" on page 103 v "1160 LCD unit" on page 106 v "1170 Top shielding assembly" on page 110 112 ThinkPad Edge 14″, Edge 15″, E40, and E50 Hardware Maintenance Manual