HP Pavilion zt1100 Service Manual page 71

Symptom Call Center:
Suggestions
Display
Dark display, no Make sure notebook is
light. turned on and warmed up.
Check power supply.
Adjust display brightness.
Press Fn+F5 several times.
Make sure SDRAM modules
are installed properly.
Make sure display cables are
properly connected.
Make sure CPU module is
installed properly.
Try external monitor.
White display. Adjust display brightness.
Erratic display.
Bright or missing See quality statement on
pixels or lines. page 5-2.
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 Check connections.
does not work.
Press Fn+F5 several times.
Try display on another
computer.
Display difficult to Check display resolution
read or part of (default is 1024 × 768).
desktop not visible.
Use HP Desktop Zoom to
adjust size of desktop icons
and labels.
Cannot switch to TV Fn+F5 switches only
display by pressing between internal LCD and
Fn+F5 external display connected to
VGA port, and will not switch
to TV display connected to
TV output port.
HP Pavilion zt1100/xz100 Omnibook xt1000
Repair Center: Repair Center:
Likely Causes Comments
Display cable Check cable connections.
connection.
Replace SDRAM modules.
SDRAM modules.
Replace CPU module.
CPU module.
Replace display assembly.
Display assembly.
If external monitor displays
Motherboard. no image, replace
motherboard.
Display assembly.
Display cable Check display cable
connection. connection.
Display assembly.
Motherboard.
Display cable Check display cable
connection. connection.
Display assembly. See quality statement on
page 5-2.
Declared to be caused by
customer abuse.
Usually caused by Declared to be caused by
closing display with customer abuse.
pencil-sized object
on keyboard.
Declared to be caused by
customer abuse.
Caused by excessive Declared to be caused by
pressure applied to customer abuse.
area on screen.
External display.
Motherboard.
Troubleshooting and Diagnostics 3-9