HP PAVILION Pavilion ZE4300 Service Manual page 108

Symptom
Display
Dark display, no light
White display
Erratic display
Bright or missing pixels or
lines.
Punctured display
Vertical crack near center
of display.
Scratched display glass
Local area of dark or light
discoloration visible when
display is on
External display does not
work
Hard disk
Hard disk never spins
Hard disk makes clunking
or scratching noise
Hard disk makes buzzing
or whining noise
Service Manual
Call Center: Suggestions
Make sure notebook is turned on and
warmed up.
Check power supply.
Make sure SDRAM modules are
installed properly.
Adjust display brightness.
Press several times.
Fn+F5
Try external monitor.
Adjust display brightness.
See quality statement on page 5-3.
Check connections.
Press several times.
Fn+F5
Try display on another computer.
Check power source.
Remove and reinstall hard drive.
Check connector.
Back up disk immediately.
Was notebook or drive dropped?
Back up disk immediately.
Check hard disk installation.
Check for alternate noise sources,
such as PCMCIA drive or fan.
Repair Center:
Likely Causes
Display cable connection
SDRAM modules
CPU module
Display assembly
Motherboard
Display assembly
Switchboard PCA
Display cable connection
Switchboard PCA
Display assembly
Motherboard
Display cable connection
Display assembly
Usually caused by closing
display with pencil-sized
object on keyboard
Caused by excessive
pressure applied to area on
screen
External display
Motherboard
Hard drive or connector
Motherboard
Hard drive
Depends on noise source
Troubleshooting and Diagnostics
Repair Center:
Comments
Check cable
connections.
Replace SDRAM
modules.
Make sure CPU module
is installed properly,
replace CPU module.
Check display cable
connections, replace
display assembly.
If external monitor
displays no image,
replace motherboard.
Check display cable
connection.
Check display cable
connection.
See quality statement on
page 5-3.
Declared to be caused by
customer abuse.
Declared to be caused by
customer abuse.
Declared to be caused by
customer abuse.
Declared to be caused by
customer abuse.
If drive case is damaged,
drive may not operate
properly.
Check notebook and
drive for evidence of
customer abuse.
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