HP Pavilion Hdx9400 Entertainment Notebook Pc Series Service Guide

							●Avoid contact with pins, leads, or circuitry.
●Turn off power and input signals before inserting or removing connectors or test equipment.
Equipment guidelines
Grounding equipment must include either a wrist strap or a foot strap at a grounded workstation.
●When seated, wear a wrist strap connected to a grounded system. Wrist straps are flexible straps
with a minimum of one megohm ±10% resistance in the ground cords. To provide proper ground,
wear a strap snugly against the skin at all times. On grounded mats with banana-plug connectors,
use alligator clips to connect a wrist strap.
●When standing, use foot straps and a grounded floor mat. Foot straps (heel, toe, or boot straps) can
be used at standing workstations and are compatible with most types of shoes or boots. On
conductive floors or dissipative floor mats, use foot straps on both feet with a minimum of one megohm
resistance between the operator and ground. To be effective, the conductive strips must be worn in
contact with the skin.
The following grounding equipment is recommended to prevent electrostatic damage:
●Antistatic tape
●Antistatic smocks, aprons, and sleeve protectors
●Conductive bins and other assembly or soldering aids
●Nonconductive foam
●Conductive tabletop workstations with ground cords of one megohm resistance
●Static-dissipative tables or floor mats with hard ties to the ground
●Field service kits
●Static awareness labels
●Material-handling packages
●Nonconductive plastic bags, tubes, or boxes
●Metal tote boxes
●Electrostatic voltage levels and protective materials
The following table lists the shielding protection provided by antistatic bags and floor mats.
MaterialUseVoltage protection level
Antistatic plasticBags1,500 V
Carbon-loaded plasticFloor mats7,500 V
Metallized laminate Floor mats 5,000 V
Unknown user password
If the computer you are servicing has an unknown user password, follow these steps to clear the password.
NOTE:These steps also clear CMOS.
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							Before disassembling the computer, 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 
Battery on page 36).
5.Remove the RTC battery (see 
RTC battery on page 74).
6.Wait approximately 5 minutes.
7.Replace the RTC battery and reassemble the computer.
8.Connect AC power to the computer. Do not reinsert any batteries at this time.
9.Turn on the computer.
All passwords and all CMOS settings have been cleared.
Component replacement procedures
This chapter provides removal and replacement procedures.
There are as many as 154 screws, in 18 different sizes, that must be removed, replaced, or loosened
when servicing the computer. Make special note of each screw size and location during removal and
replacement.
Serial number
Report the computer serial number to HP when requesting information or ordering spare parts. The serial
number is located on the bottom of the computer.
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							Battery
DescriptionSpare part number
9-cell, 2.55-Ah, 83-Wh battery 448158-001
Before disassembling the computer, 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.
Remove the battery:
1.Turn the computer upside down on a flat surface.
2.Slide the battery release latch (1) to release the battery.
3.Pivot the battery (2) upward and remove it from the computer (3).
To insert the battery, insert the rear edge of the battery into the battery bay and pivot the front edge of
the battery downward until it is seated. The battery release latch automatically locks the battery into place.
Computer feet
DescriptionSpare part number
Rubber Feet Kit (includes 11 computer feet in 4 sizes) 452320-001
The computer feet are adhesive-backed rubber pads. The feet attach to the base enclosure in the locations
illustrated below.
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							Display assembly internal components
NOTE:If it has been determined that the display bezel, camera module, display inverter, display panel,
or speakers are the components that must be replaced to complete the computer repair, the display
assembly does not have to be completely removed from the computer. Replacement of these components
can be completed by removing only the display bezel. Follow the procedures in this section to replace
the display bezel, camera module, display inverter, display panel, or speakers. For information on
replacing the entire display assembly, see 
Display assembly on page 60.
Before removing the display bezel, 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 
Battery on page 36).
Remove the display bezel:
1.Turn the computer display-side up, with the rear panel toward you.
2.Open the computer as far as possible.
3.Remove the two rubber screw covers from the back of the display assembly (1). All rubber screw
covers and logo labels removed in this section are included in the Display Rubber Pad Kit, spare part
number 454595-001.
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							4.Remove the two Phillips 2.5×5.0 screws (2) that secure the display bezel to the display enclosure.
5.Position the computer with the front toward you.
6.Remove the following screw covers and logo labels:
(1) Two rubber screw covers on the display bezel top edge corners
(2) Two rubber screw covers on the display bezel top edge
(3) Four rubber screw covers on the display bezel left and right sides
(4) Speaker logo label on the display bezel lower left edge
(5) Computer model logo label on the display bezel lower right edge
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							7.Remove the ten Phillips PM2.5×5.0 screws that secure the display bezel to the display assembly.
8.Flex the inside edges of the left and right sides (1) and the top and bottom edges (2) of the display
bezel until the bezel disengages from the display enclosure.
9.Remove the display bezel (3). The display bezel is available using spare part number
452307-001.
10.If it is necessary to replace the camera module, remove the two Phillips PM2.5×5.0 screws (1) that
secure the camera module to the display enclosure.
11.Release the camera module (2) from the display enclosure as far as the camera module cable allows.
Component replacement procedures 39 
						

							12.Disconnect the camera module cable (3) from the camera module.
13.Remove the camera module. The camera module is available using spare part number
452304-001.
14.If it is necessary to replace the display inverter, remove the display inverter (1) from the display
enclosure as far as the two display inverter cables and the backlight cable allow.
15.Disconnect the two display panel cables (2) and the backlight cable (3) from the display inverter.
16.Remove the display inverter. The display inverter is available using spare part number
452308-001.
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							17.I f  i t  i s  n e c e s s a r y  t o  r e p l a c e  t h e  display panel, remove the eight Phillips PM2.5×5.0 screws that secure
the display panel to the display enclosure.
18.Tilt the top edge of the display panel (1) forward until the display panel cable connector is accessible.
19.Squeeze the tabs on the display panel cable connector (2) together and disconnect the cable (3)
from the display panel.
20.Remove the display panel. The display panel is available using spare part numbers 452301-001
(20.1-inch, WSXGA+BrightView) and 452302-001 (20.1-inch, WUXGA).
21.If it is necessary to replace the speakers, disconnect the speaker cable connectors (1) from the
speaker extension cable connectors.
22.Remove the two Phillips PM2.5×5.0 screws (2) that secure each speaker to the display enclosure.
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							23.Remove the speakers (3). The speakers are available using spare part number 452310-001
Reverse this procedure to install the display bezel, camera module, display inverter, display panel, and
speakers.
Hard drive
NOTE:All hard drive spare part kits include a hard drive bracket.
DescriptionSpare part number
320-GB, 5400-rpm459611-001
250-GB, 5400-rpm454605-001
200-GB, 4200-rpm448155-001
160-GB, 5400-rpm448154-001
120-GB, 7200-rpm448152-001
120-GB, 5400-rpm448153-001
100-GB, 7200-rpm452313-001
Before removing the hard drive, 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 
Battery on page 36).
Remove the hard drive:
1.Loosen the six black Phillips PM2.0×5.0 captive screws (1) that secure the hard drive bay cover to
the computer.
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							2.Lift the rear edge of the hard drive bay cover (2), swing it forward, and remove the cover. The hard
drive bay cover is included in the Plastics Kit, spare part number 448171-001.
3.Loosen the Phillips PM2.5×12.0 screw (1) that secures each hard drive to the computer.
4.Disconnect the hard drives (2) from the system board by sliding the hard drives away from the hard
drive connectors.
5.Remove the hard drives (3) from the hard drive compartments.
6.If it is necessary to replace the hard drive bracket, remove the four Phillips PM3.0×4.0 screws (1)
that secure the hard drive bracket to the hard drive.
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