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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.
a ICH (I/O Controller Hub)
b CPU
c Video chip
d MCH (Memory Controller Hub)
Note:
c is only for the models with the VGA system board.
UMA:
a
b
d
VGA:
a
b
d
c
114 ThinkPad SL400, SL400c, SL500, and SL500c Hardware Maintenance Manual