ThinkPad T420 Hardware Maintenance Manual page 119

c
Platform Controller Hub (PCH)
d
Graphic Processing Unit (GPU) (Discrete graphics chip)
Note: The GPU
do not have a GPU on the system board.
For Switchable Graphics models:
For Integrated Graphics models:
Downloaded from LpManual.com Manuals
d is only for models with switchable graphics. Models with integrated graphics
a
d
c
b
a
c
b
1
.
Chapter 8 Removing and replacing a FRU
113