HP Omnibook Xt1500 Service Manual

							Technology Code ID)  Removal and Replacement  2-39 
Component Removal Procedure Additional Steps 
PCA, volume control Keyboard cover 
(page 2-9). 
Keyboard (page 2-11). 
Display assembly 
(page 2-18).  
Top case (page 2-27). 
Hinge saddle, right 
(page 2-30). Carefully lift the PCA off of its connector and out of the 
notebook. 
 
Saddles, hinge See page 2-30.   
Socket, PCMCIA Plug-in module (page 2-5). 
Hard disk drive (page 2-6). 
Keyboard cover 
(page 2-9). 
Keyboard (page 2-11). 
SDRAM modules  
(page 2-13). 
Mini-PCI card (page 2-16). 
Display assembly 
(page 2-18). 
Fan and heatsink 
(page 2-22). 
CPU module (page 2-25). 
Top case (page 2-27). 
Hinge saddles 
(page 2-30). 
Motherboard (page 2-32). Remove the four screws (M2x3.5) attaching the 
PCMCIA socket to the motherboard, and remove the 
socket. 
Speaker, left See page 2-18.   
Speaker, right See page 2-22.   
Tray, hard disk drive See page 2-7. 
 
  
						

							Technology Code ID)  Troubleshooting and Diagnostics  3-1 
3 
Troubleshooting and Diagnostics 
This chapter includes troubleshooting and diagnostic information for testing the functionality of the 
notebook, and for identifying faulty components: 
• Troubleshooting information 
…Checking for customer abuse (page 3-3). 
…Troubleshooting the problem (page 3-4). 
…Verifying the repair (page 3-4). 
…Suggestions for troubleshooting (page 3-5). 
• Diagnostic tools 
…e-DiagTools diagnostic program (page 3-22). 
…Power-on self-test (page 3-25). 
…Sycard PCCtest 450 PC Card (page 3-26). 
…BIOS configuration utility (page 3-27). 
  
						

							3-2  Troubleshooting and Diagnostics  Technology Code ID) 
Troubleshooting 
The suggestions in this section can help isolate and repair the cause of a problem. To ensure quality 
repairs, follow the basic troubleshooting steps shown below. 
  
Check the customer’s description
of the problem and any supporting
information.
Try to duplicate the customer’s
problem.
Troubleshoot the problem using:
  - Diagnostic tools.
  - Troubleshooting suggestions.
Verify the repair by testing the
functionality of the complete unit.
Check for customer abuse.
 
Figure 3-1. Basic Troubleshooting Steps  
						

							Technology Code ID)  Troubleshooting and Diagnostics  3-3 
Checking for Customer Abuse 
Some units may appear to have been damaged by customer abuse. Use these guidelines to help 
determine if this is the case: 
• If the shipping box is seriously damaged, customer abuse cannot be declared. 
• If the damage could have a cause other than customer abuse, customer abuse cannot be declared. 
• If the unit shows any of the following, customer abuse is declared: 
…Missing parts. 
…Broken plastic parts. 
…Parts not original to the unit. 
…Damaged or missing keys on the keyboard. 
Table 3-2 on page 3-5 includes additional criteria for determining customer abuse to specific parts of 
the unit. 
 
Important 
Parts damaged by customer abuse are not covered by the warranty. 
  
						

							3-4  Troubleshooting and Diagnostics  Technology Code ID) 
Troubleshooting the Problem 
Record pertinent information about the notebook: 
• Model and serial number. 
• Operating system and version. 
• Software version (hidden file c:\version.inf). 
• BIOS version. 
• Accessories and peripherals used. 
Analyze the problem: 
• Observe Symptoms. Using the customer’s information, try to duplicate the problem. Determine 
how the problem differs from proper behavior. Also, note the functions that do work properly. 
• Separate Problems. If there is more than one symptom, separate them into distinct problems. 
• Consider Causes. Keep in mind possible causes for each problem. Use the diagnostic tools and 
troubleshooting suggestions to help find the possible causes. 
…The e-DiagTools diagnostic program tests most of the notebook’s components using 
automatic and interactive tests, and will be your primary troubleshooting tool. Other tools 
include the power-on self-test, the BIOS configuration utility, and the Sycard PCCtest. Table 
3-1 on page 3-5 shows how you can use these tools to isolate the cause of the notebook’s 
problem. 
…The troubleshooting suggestions on page 3-5 include general suggestions for repairing units 
that show specific failure symptoms. 
Swapping modules that may be defective with others known to be good is generally an ideal way to 
find the module responsible for the problem. A failure symptom is rarely caused by more than one 
module, so you will not usually need to replace more than one to correct a particular failure. 
After you replace a module, the notebook will normally be in a confused state and lock up when you 
apply power. If this happens, press the reset switch: this resets the notebook, so that you can restart it 
in a known state. 
Verifying the Repair 
Before returning the repaired notebook to the customer, verify the repair by running the following 
tests: 
• e-DiagTools Basic Diagnostic Test. Run the basic test of the e-DiagTools diagnostic program 
(page 3-22). 
 –and– 
• Function Tests. Run tests that check the repaired function, such as in the e-DiagTools 
diagnostic program (page 3-22). 
 –and– 
• Failed Tests. Run any other tests that failed during troubleshooting.  
						

							Technology Code ID)  Troubleshooting and Diagnostics  3-5 
Suggestions for Troubleshooting 
  Table 3-1. Scope of Diagnostic Tools 
Function e-DiagTools Power-on self-test Sycard PCCtest 450 BIOS 
Bootup  Tests    Configures 
Processor Tests Tests     
Memory Tests Tests     
Fan Tests      
Batteries   Tests (CMOS battery 
only)    at boot to calibrate 
Display Tests      
Hard disk Tests Tests     
Keyboard Tests Tests     
Parallel Tests      
LAN Tests      
Modem Tests      
PCMCIA/ 
PC Cardbus Tests   Tests †  
CD/DVD drive Tests  Tests (with boot CD)     
†  Use an appropriate external device to exercise the port. See the help text for the tests. 
 
If you cannot isolate the cause of a problem using the above diagnostic tools, use the suggestions in 
the following table to help find the problem. 
 
Table 3-2. Troubleshooting Suggestions 
Symptom Call Center: 
Suggestions 
Repair Center: 
Likely Causes 
Repair Center: 
Comments 
To help determine likely causes, check to see what replaceable modules are involved in the system function and 
what roles they play. See Figure 1-8 on page 1-14 and Table 1-6 on page 1-15. 
Startup    
Does not boot on 
battery, but boots 
on AC. Make sure battery is properly 
installed and fully charged. 
Check battery contacts. If 
available, try another battery. Battery or contacts. 
Motherboard.  
Does not boot from 
CD in CD/DVD 
drive. Make sure CD is bootable. 
Use BIOS configuration utility 
to check boot order. 
Restart notebook. CD/DVD drive. 
Motherboard.  
Sluggish startup or 
shutdown. Check disk using Tools tab in 
disk’s Properties sheet, and 
use Disk Defragmenter to 
optimize hard drive. 
Delete temporary and 
unneeded files. Hard drive.  Use suggestions shown at 
left.  
						

							3-6  Troubleshooting and Diagnostics  Technology Code ID) 
Symptom Call Center: 
Suggestions 
Repair Center: 
Likely Causes 
Repair Center: 
Comments 
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. 
Power/Battery    
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.   
						

							Technology Code ID)  Troubleshooting and Diagnostics  3-7 
Symptom Call Center: 
Suggestions 
Repair Center: 
Likely Causes 
Repair Center: 
Comments 
Battery does not 
charge. Make sure AC adapter is 
connected properly and 
battery installed properly. 
Check battery contacts. If 
available, try another battery 
and AC adapter. 
Move notebook away from 
any nearby heat source. 
Unplug AC adapter and allow 
battery to cool down. Check 
for blocked air vents. Battery or contacts. 
AC adapter. 
Motherboard. 
Fan. 
Heatsink. Check battery and AC 
adapter. 
Check fan and heatsink. 
AC adapter does 
not power 
notebook. Try another AC adapter, if 
available. AC adapter. 
Motherboard. AC adapter cannot be 
repaired, and must be 
replaced. 
Notebook has short 
operating time. Turn down display 
brightness. 
Check timeout settings in 
Power Options in Control 
Panel. 
Battery gauge may need 
calibration. Restart notebook, 
press F6 when HP logo 
appears, and follow onscreen 
instructions. This calibrates 
the battery, and requires four 
to five hours. You cannot use 
notebook during this process. 
Certain applications can 
cause excess CPU and 
power usage. (Users can get 
Intel Power Monitor from 
www.intel.com and monitor 
CPU load.) 
W hen playing DVD movies 
on battery power, use Power 
Options in Control Panel to 
select Portable/Laptop power 
scheme. 
W hen using applications with 
automatic save feature (such 
as MS W ord), extend save 
time or disable to reduce 
hard disk access and power 
usage. 
PCMCIA card use can affect 
battery life. Some PCMCIA 
cards draw power even while 
not in use. 
Heavy modem use can affect 
battery operating time. Battery. 
Motherboard. Rechargeable batteries tend 
to degrade over time. 
Appropriate battery training 
and calibration is required for 
maximum battery life. Battery 
life may vary depending on 
notebook model. 
Approximate battery life by 
type (depending on usage 
and battery calibration): 
 8-cell LiIon: up to 3.5 hrs. 
 6-cell LiIon: up to 2.5 hrs. 
 8-cell NiMH: up to 2 hrs.  
						

							3-8  Troubleshooting and Diagnostics  Technology Code ID) 
Symptom Call Center: 
Suggestions 
Repair Center: 
Likely Causes 
Repair Center: 
Comments 
Battery indicator is 
inaccurate. Time Remaining is an 
estimate based on how much 
power the notebook is using 
at that moment. It therefore 
depends on the current task, 
and assumes power will be 
used at the same rate until 
the battery runs out. So, for 
example, if the notebook is 
performing a task requiring a 
good deal of power (such as 
reading from a CD or DVD), 
the value will probably show 
too little time remaining.   
Standby/resume    
General problems  Close all applications before 
entering (or allowing 
notebook to enter) standby or 
hibernation. 
If problem appears after 
installing new software 
(including drivers), uninstall 
that software. Contact 
software vendor for additional 
support.   
Notebook resumes 
slowly from standby Notebook can take a minute 
or longer to resume if 
network card is installed. 
Blinking cursor appears while 
system is loading and 
checking hardware and 
network connections. W hen 
hardware is reinitialized, 
W indows desktop appears.   
Does not go on 
standby as 
expected. The notebook won’t suspend 
if it has an active connection 
to another computer. 
If the notebook is busy, it 
normally waits to finish the 
current operation before 
suspending.   
Does not 
automatically enter 
hibernation as 
expected. Make sure hibernate support 
is enabled in Power Options 
in Control Panel. Also, make 
sure the hibernate timeouts 
(Power Schemes tab) for AC 
and battery power are not set 
to Never.   
Notebook with 
Bluetooth won’t 
enter standby or 
hibernation. Disable Bluetooth. If 
Bluetooth device is 
transmitting, notebook may 
not be able to enter standby 
or hibernation.