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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 W701 and W701ds:
a PCH (Platform Controller Hub)
b CPU
c Video sub card (Mobile PCI Express Module)
d Accelerometer chip for the HDD Active Protection System
Upper side of the system board:
a
b c
Bottom side of the system board:
d
Removing and replacing a FRU 159