System Board - HP XT905UT Maintenance And Service Manual

Reverse this procedure to install the speaker assembly.

System board

NOTE: All system board spare part kits include replacement thermal material and VGA support
bracket.
NOTE: Models that support quad-core processors have four memory slots. Models that support
dual-core processors have two memory slots.
Description
For use with the following dual-core processors: 520M, 540M, 620M
For use with the following quad-core processors: 720QM, 820QM
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.
b.
c.
d.
e.
f.
g.
h.
i.
j.
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
●
WLAN module (see
96 Chapter 4 Removal and replacement procedures
Battery on page
Hard drive (see Hard drive on page
Optical drive (see Optical drive on page
Keyboard (see Keyboard on page
Switch cover (see Switch cover on page
Display assembly (see
Fan (see Fan on page 73)
Heat sink (see Heat sink on page
Top cover (see Top cover on page
ExpressCard/audio assembly (see
Modem module (see Modem module on page
SIM on page 48)
Expansion memory modules on page
WLAN module on page
47).
54)
49)
65)
71)
Display assembly on page
75)
87)
ExpressCard/audio assembly on page
69)
81)
91)
60)
Spare part number
595764-001
595765-001
92)