HP Omnibook Xt1500 Service Manual

Technology Code ID)  Troubleshooting and Diagnostics  3-19 
Symptom Call Center: 
Suggestions 
Repair Center: 
Likely Causes 
Repair Center: 
Comments 
PC card    
Miscellaneous 
problems. Remove and reinsert PC 
card. 
Restart notebook. 
Try card in other slot or in 
another computer. 
Check for conflicts or refresh 
device list in Device 
Manager. If card requires an 
IRQ, make sure one is 
available. 
Check HP Notebook W eb 
site for installation 
instructions and information 
about supported PC cards...

3-20  Troubleshooting and Diagnostics  Technology Code ID) 
Symptom Call Center: 
Suggestions 
Repair Center: 
Likely Causes 
Repair Center: 
Comments 
Performance    
Notebook still on 
but stops 
responding. Press Ctrl+Alt+Del and end 
any application not 
responding. 
Press and hold the power 
button four seconds to turn 
off and reset notebook, then 
press the power button to 
turn the notebook back on. 
If this fails, use a pen to 
press reset switch, then 
press power button to turn 
notebook back...

Technology Code ID)  Troubleshooting and Diagnostics  3-21 
Symptom Call Center: 
Suggestions 
Repair Center: 
Likely Causes 
Repair Center: 
Comments 
Notebook gets 
abnormally hot. Always set notebook on a flat 
surface, so air can flow freely 
around and underneath. 
Make sure air vents are 
clear. 
Check fan and heatsink 
installation. 
Games and other programs 
that drive CPU usage toward 
100% can contribute, as can 
charging battery. Fan. 
Heatsink. Check fan and heatsink for 
proper operation or...

3-22  Troubleshooting and Diagnostics  Technology Code ID) 
Diagnostic Tools 
This section describes the following diagnostic tools you can use for troubleshooting and repairing the 
notebook: 
• e-DiagTools diagnostic program (below). 
• Power-on self-test (page 3-25). 
• Sycard PCCtest 450 PC Card (page 3-26). 
• BIOS configuration utility (page 3-27). 
e-DiagTools Diagnostic Program 
The e-DiagTools hardware diagnostic program provides two levels of testing: 
• Basic user-level hardware test. 
•...

Technology Code ID)  Troubleshooting and Diagnostics  3-23 
Running e-DiagTools 
1.  Restart the notebook: click Start, Turn Off Computer, Restart. 
2.  When the HP logo appears, press F10 to start the diagnostic test. 
3.  When the menu appears, press F2 to run e–DiagTools. 
  The first time you run the program, you are prompted to select the language for the program. 
4.  When the Configuration Description appears, verify the list of detected hardware. 
Note 
If a device is not detected or fails its...

3-24  Troubleshooting and Diagnostics  Technology Code ID) 
Note that the parallel port test is more thorough if you connect a loop-back connector to the port 
before running the test. See the wiring diagrams below. 
141
25 13
 
Figure 3-3. Parallel Loopback Connector 
Interpreting the Results 
The e-DiagTools diagnostic program returns test groups, error codes, and suggestions for repair and/or 
follow-up actions. Consider these suggestions in combination with other troubleshooting information 
in...

Technology Code ID)  Troubleshooting and Diagnostics  3-25 
Power-On Self-Test 
The POST (Power-On Self-Test) is a series of initialization routines and diagnostic tests that the 
system BIOS runs when the notebook boots. The system BIOS will not boot the operating system if 
system memory, the CPU, DMA, or interrupt controller fails the POST diagnostic tests. POST 
progress is indicated by a sequence of codes, and error messages are displayed if possible. 
You should not necessarily interpret the...

3-26  Troubleshooting and Diagnostics  Technology Code ID) 
Beep Code Message Description 
(None)  RAM ERROR AT LOCATION xxxxxx : 
WROTE : xxxx 
READ : xxxx RAM failed during memory test at the indicated 
location. 
(None)  PARITY ERROR AT UNKNOW N 
LOCATION Parity error during memory test at unknown 
location. 
(None)  PARITY ERROR AT LOCATION xxxxxx  Parity error during memory test at the indicated 
location. 
(None)  NO INTERRUPTS FROM TIMER 0  Timer 0 of the clock timer controller does not 
generate...

Technology Code ID)  Troubleshooting and Diagnostics  3-27 
BIOS Configuration Utility 
The BIOS configuration utility provides access to basic system settings. It is independent of the 
operating system. 
Running the BIOS configuration utility 
1.  Restart the notebook. 
2.  When the HP logo appears, press F2 to enter the BIOS configuration utility. 
3.  The pointing devices are not active in the BIOS configuration utility, so you will need to use the 
keyboard to navigate: 
• Press the left and right...

3-28  Troubleshooting and Diagnostics  Technology Code ID) 
Language  Sets the language for the BIOS menus.  English (US) 
Security Menu Description Default 
User Password is  Shows if a user password is set.  Clear 
Administrator Password 
is Shows if an administrator password is set.  Clear 
Set User Password  Press ENTER to set, change, or clear the user password. 
The password can have no more than 8 characters (0-9, 
A-Z), and cannot include special or accented characters. Enter 
Set Administrator...