HP Pavilion Hdx9575la Entertainment Notebook Pc Service Guide

d.Hinge cover (see Hinge cover on page 56)
e.Rear cover (see 
Rear cover on page 57)
f.Top cover (see 
Top cover on page 59)
Remove the subwoofer:
1.Disconnect the subwoofer cable (1) from the system board.
2.Remove the three Phillips PM2.5×8.0 screws (2) that secure subwoofer the to the base enclosure.
3.Remove the subwoofer (3).
CAUTION:When installing the subwoofer, do not overtighten the screws. Overtightening the
subwoofer screws can result in damage to the subwoofer grommets (4), which can cause a...

4.Remove the battery (see Battery on page 38).
5.Remove the following components:
a.Hard drive (see 
Hard drive on page 45)
b.Optical drive (see 
Optical drive on page 52)
c.Keyboard (see 
Keyboard on page 54)
d.Hinge cover (see 
Hinge cover on page 56)
e.Rear cover (see 
Rear cover on page 57)
f.Top cover (see 
Top cover on page 59)
g.Subwoofer (see 
Subwoofer on page 72)
Remove the video connector board:
1.Disconnect the video connector board cable (1) from the system board.
2.Remove the Phillips...

Processor fan
DescriptionSpare part number
Processor fan448162-001
NOTE:To properly ventilate the computer, allow at least a 7.6-cm (3-inch) clearance on the left and
right sides and rear panel of the computer. The computer uses two electric fans for ventilation. The fans
are controlled by a temperature sensor and are designed to turn on automatically when high temperature
conditions exist. These conditions are affected by high external temperatures, system power consumption,
power management/battery...

3.Remove the processor fan (3).
Reverse this procedure to install the processor fan.
System board
DescriptionSpare part number
System board (includes power connector cable, ExpressCard assembly, and replacement thermal
material)448145-001
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...

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:
●Memory module (see 
Memory module on page 50)
●RTC battery (see 
RTC battery on page 81)
●WLAN module (see 
WLAN module on page 47)
Remove the system board:
1.Remove the power connector (1) from the clip built into the base enclosure.
2.Disconnect the rear USB board cable (2) and the power connector LED board cable (3) from the
system board....

3.Disconnect the following cable connectors from the system board:
(1) Speaker cable
(2) Microphone cable
(3) Audio/infrared board cable
(4) Subwoofer cable
(5) Audio connector board cable
4.Disconnect the following cables from the system board:
(1) Bluetooth module cable
(2) Front USB board cable
(3) Processor fan cable
(4) Composite video connector board cable
5.Remove the two SM1.5×9.0 screws (1) on each side of the expansion port 3 connector.
78 Chapter 4   Removal and replacement procedures 

6.Remove the four Phillips PM2.5×4.0 screws (2) that secure the system board to the base enclosure.
7.Loosen the captive Phillips PM2.5×14.0 screw (3) that secures the video heat sink and system board
to the base enclosure.
8.Use the optical drive connector (1) to lift the right side of the system board (2) until it rests at an
angle.
9.Remove the system board (3) by pulling it away from the base enclosure at an angle.
Reverse this procedure to install the system board.
Component replacement procedures 79 

Audio connector board
DescriptionSpare part number
Audio connector board (includes cable) 452317-001
Before removing the audio connector 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...

3.Remove the audio connector board (3) from the base enclosure.
Reverse this procedure to install the audio connector board.
RTC battery
NOTE:Removing the RTC battery and leaving it uninstalled for 5 or more minutes causes all passwords
and CMOS settings to be cleared.
DescriptionSpare part number
RTC battery452319-001
Before removing the RTC battery, 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...

g.Subwoofer (see Subwoofer on page 72)
h.System board (see 
System board on page 76)
Remove the RTC battery:
▲Remove the RTC battery from the socket on the system board.
Reverse this procedure to install the RTC battery.
82 Chapter 4   Removal and replacement procedures