Heat Sink Assembly - HP ProBook 645 G4 Maintenance And Service Manual

Reverse this procedure to install the fan.

Heat sink assembly

Description
Heat sink assembly
Before removing the heat sink, follow these steps:
1. Shut down the computer.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and then
unplugging the AC adapter from the computer.
4. Remove the following components:
a. Bottom cover (see
b. Battery (see
c. Hard drive (see
d. Solid-state drive (see
e. WWAN module (see
f. Keyboard (see
g. Internal frame (see
To remove the heat sink assembly:
1. In the order indicated on the heat sink assembly, loosen the four captive Phillips screws that secure the
assembly to the computer (1).
Bottom cover on page
Battery on page 34)
Hard drive on page 37)
Solid-state drive on page
WWAN module on page
Keyboard on page 43)
Internal frame on page
33)
39)
40)
47)
Component replacement procedures
Spare part number
L09537-001
51