Fan/Heat Sink Assembly - HP ProBook 450 G1 Maintenance And Service Manual

Fan/heat sink assembly

All fan/heat sink assembly spare part kits include replacement thermal material.
Description
Fan/heat sink assembly for use in models with UMA graphics
Fan/heat sink assembly for use in models with discrete graphics
Before removing the fan/heat sink assembly, follow these steps:
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
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 battery (see
5. Remove the following components:
a. Service door (see
b. Hard drive (see
c. Optical drive (see
d. WLAN/Bluetooth module (see
e. WWAN module (see
f. Keyboard (see
g. Top cover (see
h. System board (see
Remove the fan/heat sink assembly:
1. Position the system board upside-down.
2. Models are available with either UMA or discrete graphics. The heat sink on discrete models includes 2
additional screws. Refer to the following steps that match your model:
Discrete models:
a. To remove the discrete fan/heat sink assembly, in the order indicated on the heat sink, loosen the
6 captive Phillips screws (1)-(6) that secure the heat sink to the system board.
b. Disconnect the fan cable from the system board (7).
76 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts
Battery on page 37).
Service door on page 38).
Hard drive on page 39)
Optical drive on page 42)
WLAN/Bluetooth combo card on page
WWAN module on page
Keyboard on page 50)
Top cover on page 54)
System board on page
48)
68)
Spare part number
721938-001
721937-001
46)