3-12
Troubleshooting and Diagnostics
Service Manual
Symptom
Call Center: Suggestions
Repair Center:
Likely Causes
Repair Center:
Comments
Erratic display
Display cable
connection
Switchboard PCA
Display assembly
Motherboard
Check display cable
connection.
Bright or missing
pixels or lines.
See quality statement on
page 5-3.
Display cable
connection
Display assembly
Check display cable
connection.
See quality
statement on page 5-
3.
Punctured display
Declared to be
caused by customer
abuse.
Vertical crack near
center of display.
Usually caused by
closing display with
pencil-sized object on
keyboard
Declared to be
caused by customer
abuse.
Scratched display
glass
Declared to be
caused by customer
abuse.
Local area of dark or
light discoloration
visible when display
is on
Caused by excessive
pressure applied to area
on screen
Declared to be
caused by customer
abuse.
External display does
not work
Check connections.
Press
Fn+F5
several times.
Try display on another
computer.
External display
Motherboard
Hard disk
Hard disk never spins
Check power source.
Remove and reinstall hard
drive. Check connector.
Hard drive or connector
Motherboard
If drive case is
damaged, drive may
not operate properly.
Hard disk makes
clunking or scratching
noise
Back up disk immediately.
Was notebook or drive
dropped?
Hard drive
Check notebook and
drive for evidence of
customer abuse.
Hard disk makes
buzzing or whining
noise
Back up disk immediately.
Check hard disk installation.
Check for alternate noise
sources, such as PCMCIA
drive or fan.
Depends on noise
source