HP ProBook 4430s Maintenance And Service Manual page 99

Before removing the system board, 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. Bottom door (see
b. Hard drive (see
c. Optical drive (see
d.
Modem module (see
e. Fan (see Fan on page
f.
Heat sink (see
g.
Keyboard (see
h.
Top cover (see
When replacing the system board, be sure to remove the following components from the defective
system board and install on the replacement system board:
●
SIM (see SIM on page
●
Memory module (see
●
WLAN module (see
●
WWAN module (see
●
Modem module (see
●
Processor (see Processor on page
Remove the system board:
1.
Position the computer upright with the front toward you.
Battery on page 46).
Bottom door on page
Hard drive on page 51)
Optical drive on page
Modem module on page
65)
Heat sink on page 67)
Keyboard on page 62)
Top cover on page 69)
47)
Memory modules on page
WLAN/Bluetooth combo card on page
WWAN module on page
Modem module on page
68)
48).
49)
78)
53)
57)
55)
78)
Component replacement procedures
91