Lenovo ThinkPad L420 Hardware Maintenance Manual page 97

b Multi Chip Package (MCP) processor
c Video chip (only for discrete models)
d
Platform Controller Hub (PCH)
For ThinkPad L420 and L421 models with an integrated thermal module (top side view):
For ThinkPad L420 and L421 models with an integrated thermal module (bottom side view):
For ThinkPad L520 models with an integrated thermal module (top side view):
a
b
d
a
.
Chapter 8 Removing and replacing a FRU
91