Lenovo ThinkPad SL400c Hardware Maintenance Manual page 122

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