Lenovo 2901AKU, Hardware Maintenance Manual

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• 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
conductive corrugated material.
If the system supports PC-Doctor for DOS, 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 66
• “1020 Serial Ultrabay Slim device or travel bezel” on page 67
• “1030 Solid state drive (SSD) or hard disk drive (HDD)” on page 68
• “1050 PCI Express Mini Card for wireless LAN” on page 71
• “1060 PCI Express Mini Card for wireless WAN” on page 73
• “1070 Keyboard” on page 74
• “1090 Wireless USB adapter or Intel Turbo Memory” on page 78
• “1100 Palm rest or palm rest with fingerprint reader” on page 79
• “1110 Bluetooth daughter card (BDC-2)” on page 80
• “1120 Keyboard bezel and speaker assembly” on page 81
• “1130 5-in-1 Media Card Reader adapter” on page 83
• “1140 Bluetooth - wireless radio switch FPC” on page 84
• “1150 LCD unit” on page 85
Removal steps of system board, fan assembly, and 34-mm ExpressCard slot frame
Following components soldered on the top side of the system board are extremely sensitive. When you
service the system board, avoid any kind of rough handling.
For ThinkPad T400s:
a : ICH (I/O Controller Hub)
b : CPU
c : GMCH (Graphics Memory Controller Hub)
d : Accelerometer chip for the HDD Active Protection System™
a
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Hardware Maintenance Manual