HP ProBook 6475b Maintenance And Service Manual page 116

Before removing the system board, follow these steps:
1. Turn off 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 the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery (see
a. Service cover (see
b. Optical drive (see
c. Hard drive (see
d. Fan (see
e. Modem module (see
f. Fan (see
g. Keyboard (see
h. Base enclosure (see
NOTE: When replacing the system board, be sure that the following components are removed from
the defective system board and installed on the replacement system board:
●
SIM (see
●
Memory module (see
●
WWAN module (see
●
WLAN module (see
●
Heat sink (see
●
Processor (see
Remove the system board:
1. Position the computer right-side up, with the front toward you.
2. Open the computer.
3. Release the ZIF connector (1) to which the TouchPad cable is connected, and then disconnect the
TouchPad cable (2) from the system board.
4. Release the ZIF connector (3) to which the fingerprint reader board cable is connected, and then
disconnect the fingerprint reader board cable (4) from the system board.
108 Chapter 4 Removal and replacement procedures
Battery on page
Service cover on page
Optical drive on page
Hard drive on page
Fan on page 87)
Modem module on page
Fan on page 87)
Keyboard on page
Base enclosure on page
SIM on page 69, if applicable)
Memory module on page
WWAN module on page
WLAN module on page
Heat sink on page
Processor on page
68), and then remove the following components:
70)
71)
74)
85)
88)
93)
77)
80)
82)
111)
114)