HP Pavilion Dv9400 Entertainment Notebook Pc Series Service Guide

Troubleshooting
Maintenance and Service Guide 2–31
Flowchart 2.15—No Audio, Part 1
No audio.
N
Computer in
docking device
(if applicable)?Internal
audio?
Audio? Done
Undock
Audio? Done Tu r n  u p  a u d i o
internally or
externally.
Go to
“Flowchart 
2.16—No Audio, 
Par t 2.”
Go to“Flowchart 
2.17—Nonfunctioning 
Device.”
Y
Y YY
N
NN
Go to“Flowchart 
2.16—No Audio, 
Par t 2.”Replace the 
docking device. 

2–32 Maintenance and Service Guide
Troubleshooting
Flowchart 2.16—No Audio, Part 2
YN
Continued from “Flowchart 
2.15—No Audio, 
Par t 1.”
Reload
audio drivers. Audio
driver in OS
configured?
Audio?
Y Y
Y N N N
Correct
drivers for
application?
Connect to
external
speaker.Load drivers and
set configuration
in OS.
Audio? Done Replace audio
board and
speaker
connections
in computer 
(if applicable).
Replace the following components 
individually, retesting after each 
replacement:
■Internal speakers■Audio...

Troubleshooting
Maintenance and Service Guide 2–33
Flowchart 2.17—Nonfunctioning Device
Done
Any physical
device detected?
Y
N
Unplug the nonfunctioning device from the computer 
and inspect cables and plugs for bent or broken pins 
or other damage.
Reseat 
device.
Clear
CMOS.
DoneFix or
replace
broken item. Nonfunctioning
device.
Reattach device.
Close computer,
plug in power,
and reboot.
Device
boots
properly?Go to
“Flowchart 
2.9—No 
Operating System 
(OS) Loading.”
Device
boots
properly? Replace hard...

2–34 Maintenance and Service Guide
Troubleshooting
Flowchart 2.18—Nonfunctioning Keyboard
Y
N
Keyboard
operating
properly?Keyboard
not operating 
properly.
External
device
works?Replace
system
board.
Replace
system
board. Connect computer
to good external 
keyboard.
Reseat internal 
keyboard
connector
(if applicable).
Replace internal
keyboard or
cable.
Y N
Y
N
DoneDone Keyboard
operating
properly? 

Troubleshooting
Maintenance and Service Guide 2–35
Flowchart 2.19—Nonfunctioning Pointing Device
Y
N
Pointing device
not operating
properly.
External
device
works?Replace
system
board.
Replace
system
board. Connect computer
to good external
pointing device.
Reseat internal
pointing device
connector 
(if applicable).
Replace internal
pointing device 
or cable.
Y N
Y
N
DoneDone Pointing device
operating
properly?
Pointing device
operating
properly? 

2–36 Maintenance and Service Guide
Troubleshooting
Flowchart 2.20—No Network/Modem 
Connection
Y
Disconnect all
power from
the computer
and open.
No network
or modem 
connection.
N
Done Digital
line?
Network
or modem jack 
active?Replace jack 
or have jack 
activated.
Connect
to nondigital
line.
NIC/modem 
configured 
in OS?Reload
drivers and 
reconfigure.
Reseat NIC/modem
(if applicable).Replace
NIC/modem
(if applicable).
Replace
system
board.Done
N N
N N Y
Y Y
Y
Network
or modem 
connection 
working?...

Maintenance and Service Guide 3–1
3
Illustrated Parts Catalog
This chapter provides an illustrated parts breakdown and a 
reference for spare part numbers and option part numbers.
3.1 Serial Number Location
When ordering parts or requesting information, provide the 
computer serial number and model number located on the bottom 
of the computer. 

3–2 Maintenance and Service Guide
Illustrated Parts Catalog
3.2 Computer Major Components
Computer Major Components 

Illustrated Parts Catalog
Maintenance and Service Guide 3–3
Table 3-1
Spare Parts: Computer Major Components
Item DescriptionSpare Part 
Number
1Display assemblies (include wireless antenna transceivers 
and cables)
For use with full-featured computer models (includes camera, camera 
cable, and microphones):
17.0-inch, WXGA+, TFT Dual Lamp with BrightView
17.0-inch, SXGA+, TFT Single Lamp with BrightView
17.0-inch, WXGA+, TFT Single Lamp with BrightView432948-001
432947-001
432946-001
For use with...

3–4 Maintenance and Service Guide
Illustrated Parts Catalog
Computer Major Components