HP omnibook xt1000 Service Manual

3-6 

Troubleshooting and Diagnostics 

HP Pavilion zt1100/xz100 Omnibook xt1000 

Does not boot on 
AC or battery. 

Check power source. 
Press reset switch to reset 
notebook, then press power 
button to turn notebook on. 
Unplug AC adapter, remove 
battery and any PC cards, 
then reconnect power and try 
again. 
Do not use touch pad while 
booting or resuming. 
Remove battery, AC adapter, 
and any PC cards. Plug in 
AC adapter, reset notebook 
using reset switch, then 
press power button to turn 
notebook on. 
Remove all but one SDRAM 
module and try again. 
Reinsert any other SDRAM 
modules and try again. 

AC adapter. 
SDRAM module. 
CPU module. 
Motherboard. 
Display assembly. 
Hard drive. 

Check AC adapter. Remove 
any SDRAM modules and try 
again. 
If power status light does not 
turn on, replace top case. 
If power status light turns on 
but display remains off, try 
external monitor. If monitor 
shows successful boot, 
replace display assembly. If 
monitor shows activity but 
BIOS does not complete, 
replace display assembly. If 
monitor is blank, replace 
motherboard. 
If power status light and 
display turn on and BIOS 
completes, but OS does not 
start from hard disk or from 
floppy drive, replace CPU 
module, then motherboard. If 
OS starts from floppy drive, 
use Recovery CDs to 
reinstall factory software onto 
hard drive; replace hard 
drive. 

Beeps once, spins 
hard disk, repeats, 
but does not boot. 

 

SDRAM module. 

Make sure at least one 
SDRAM module is installed. 

Error message 
such as “Invalid 
system disk” or 
“Auto IDE error”. 

Check for disk in floppy drive. 
Check boot order using BIOS 
configuration utility. 
Remove and reinstall hard 
drive. 

Hard drive contacts. 
Hard drive. 

If notebook boots from floppy 
drive, check for corrupt files 
on hard drive; use Recovery 
CDs to reinstall factory 
software onto hard drive; 
replace hard drive. 

Password forgotten. 

Verify proper ownership, then 
follow removal procedure 
with owner and record 
appropriate data. See 
page 5-1. 

 

User must call Technical 
Support and provide proof of 
ownership. Password 
removal is restricted to 
certain sites. See page 5-1. 

 

 

 

No power. 

Make sure charged battery is 
installed or AC adapter 
connected. 
Try another battery or AC 
adapter if available. 

AC adapter. 
Battery. 
Motherboard. 

 

Does not run on 
battery; empty 
battery indication. 

Check battery and contacts. 
Try another battery if 
available. 

Battery or contacts. 
Motherboard. 

 

Beeps repeatedly. 

Notebook beeps repeatedly 
when battery is low. Connect 
AC adapter or replace 
battery. 

Battery.  

Notebook turns off 
immediately after 
turning on. 

Battery is probably extremely 
low. Connect AC adapter or 
replace battery. 

Battery.