HP Omnibook Xt1500 Service Manual

Technology Code ID)  Troubleshooting and Diagnostics  3-9 
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Display    
Dark display, no 
light. Make sure notebook is 
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. Display cable 
connection....

3-10  Troubleshooting and Diagnostics  Technology Code ID) 
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If you cannot 
change the display 
resolution or color 
depth while playing 
a DVD or a video 
file in AVI or MPEG 
format Set display resolution and 
color depth before starting 
DVD or video file player. You 
cannot change these settings 
once player is started.   
If a DVD or a video 
file in AVI or MPEG 
format doesn’t play 
with two displays Before...

Technology Code ID)  Troubleshooting and Diagnostics  3-11 
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Files are corrupted.  Run virus scan program. 
Check disk using Tools tab in 
disk’s Properties sheet. 
Back up files if possible, then 
use Recovery CDs to 
reformat hard disk and 
reinstall factory software.   Use suggestions shown at 
left. 
Disk capacity is 
less than normal. Check disk using Tools tab in 
disk’s Properties sheet. 
Check partitions...

3-12  Troubleshooting and Diagnostics  Technology Code ID) 
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“System Error: 
Unable to read 
drive” message. Make sure disk is clean, 
undamaged, and inserted 
correctly. Clean with soft 
cloth or replace as needed. 
W ait 5 to 10 seconds after 
closing tray before pressing 
Play. 
Restart notebook. 
Make sure CD/DVD drive is 
installed properly. CD/DVD drive. 
Motherboard.  
DVD doesn’t play 
with two displays...

Technology Code ID)  Troubleshooting and Diagnostics  3-13 
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Touch pad    
General problems.  Restart notebook. 
Press and hold power button 
four seconds to reset 
notebook. 
Avoid touching touch pad 
while booting or resuming. 
Check settings in Control 
Panel.  Top case. 
Motherboard.  
Click button does 
not work.  Top case. 
Motherboard.  
Memory    
Out of memory 
error. Make sure C drive is not 
running out...

3-14  Troubleshooting and Diagnostics  Technology Code ID) 
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Parallel/USB    
General problems.  Check connections. 
Restart notebook. 
Check port settings in Device 
Manager. 
Check settings in Control 
Panel. 
Use troubleshooters in 
W indows Help. 
For USB: contact device 
vendor and HP Notebook 
W eb site (see page vi) for 
latest USB drivers. 
For USB: if the device is 
powered by the USB port, try 
the other...

Technology Code ID)  Troubleshooting and Diagnostics  3-15 
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Modem will not 
connect at any 
speed. Make sure notebook’s 
modem is properly 
connected to wall telephone 
jack. Check cables. 
Verify settings in Control 
Panel. Make sure parity, 
speed, word length, and stop 
bits match on sending and 
receiving modems. 
Restart notebook. 
Run W indows modem 
diagnostics or modem 
troubleshooter in W indows 
Help....

3-16  Troubleshooting and Diagnostics  Technology Code ID) 
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Modem isn’t 
detected. Check modem setup in 
Control Panel. Check COM 
port. 
Open Device Manager. If 
modem is disabled, enable it. 
If conflict exists, try disabling 
another device. 
If running fax software using 
fax Class 2, try Class 1. Mini-PCI card. 
Motherboard.  
Modem connects, 
but transferred data 
is bad. Verify settings in Control 
Panel....

Technology Code ID)  Troubleshooting and Diagnostics  3-17 
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LAN/Network    
General problems.  Check cables and 
connections. 
Try connecting notebook to 
another network station (if 
applicable). 
Try connecting cable to 
another computer or network 
station. If green light next to 
LAN port does not light, LAN 
cable may not be connected 
to network or network may be 
down. 
Check settings in Device 
Manager. If...

3-18  Troubleshooting and Diagnostics  Technology Code ID) 
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Infrared    
General problems.  Make sure correct drivers are 
installed. In Device Manager, 
double-click Infrared devices, 
then double-click IrDA Fast 
Infrared Port. On Advanced 
tab, click Infrared Transceiver 
A in Property window, then 
select IBM 31T1100 from 
pull-down menu. 
Make sure the line between 
the two infrared ports is not 
blocked,...