Lenovo X301 - Manual (Page 125)

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 Accelerometer chip for the HDD Active Protection System ™
b ICH (I/O Controller Hub)
c GMCH (Integrated video chip)
d CPU
a
b
c
d
Removing and replacing a FRU 117