HP Z800 Owners Manual

●After installing a non-plug and play (PnP) expansion board or other option (such as a diskette drive),
reconfigure the workstation.
●Are all necessary device drivers installed?
●Have all printer drivers been installed for each application?
●Have you removed diskettes, optical disks, and USB drive keys from the drives before powering
on the workstation?
●Are you running the latest version of BIOS, drivers, and software?
ENWWTroubleshooting checklist 169 

HP troubleshooting resources and tools
This section provides information on the HP Help and Support Center, E-support, and Helpful Hints for
troubleshooting.
HP Help and Support Center
The HP Help and Support Center is a customized HP user interface that enhances the Windows XP
Help and Support Center Help feature. This customized utility allows you to access specific information
about your HP Workstation such as configuration information by clicking Start > Help and Support
Center. The interface also...

Active Chat enables you to electronically submit a support ticket to HP over the Web. When you submit
a support ticket, Active Chat collects information about the computer and pass it to an online support
specialist. The collection of information might take up to 30 seconds depending on the computer
configuration. When you submit a support ticket, you receive a confirmation message containing your
case ID, the support hours for your location, and the estimated time of response.
For more information about...

During operation
●Look for blinking LEDs on the front of the workstation. The blinking lights are error codes that will
help you diagnose the problem. Refer to the Diagnostic lights and audible (beep) codes section of
this document for information on interpreting diagnostic lights and audible codes.
●Press and hold any key. If the system beeps, then your keyboard is operating correctly.
●Check all cables for loose or incorrect connections.
●Wake the workstation by pressing any key on the keyboard or the...

Troubleshooting scenarios and solutions
This section presents an extensive overview of various troubleshooting scenarios and possible solutions
for a Windows-based workstation.
NOTE:For Linux troubleshooting information, refer to the HP Workstations for Linux User Manual
at 
http://www.hp.com/support/linux_user_manual.
Solving minor problems
Table 6-1  Minor problems
ProblemCausePossible Solution
Workstation appears frozen
and does not shut down when
the power button is pressed.Software control of the...

ProblemCausePossible Solution
a.Disconnect AC power to the workstation.
b.Remove a device.
c.Reconnect AC power and power on the
workstation.
2.Repeat this process until the faulty device is identified.
Remove the graphics card last. Replace the faulty
device.
3.If no faulty device is found, replace the system board.
OR
1.Press and hold the power button for less than four
seconds. If the hard drive LED does not illuminate, then
perform the following tasks:
a.Verify that the workstation is plugged into a...

To test the power supply:
1.Unplug the AC power.
2.Remove the power supply.
3.Plug in AC power and verify the following:
●If the green BIST LED on the rear of the workstation is illuminated and the fan is spinning, the
power supply is functional.
●If the green BIST LED is not illuminated or the fan is not spinning, replace the power supply.
See the Rear panel components section of this service guide to locate the BIST LED on this workstation.
Table 6-2  Power supply problems
ProblemCauseSolution
Power...

ProblemCauseSolution
c.Replace the device causing the failure
d.Continue adding devices one at a time to verify
that all devices are functioning.
2.Verify power supply functionality.
a.Disconnect AC power.
b.Remove the power supply.
c.Plug in AC power.
●If the power supply fan spins and the LED
illuminates (see 
Testing power supply
on page 174), the power supply is good.
Replace the system board.
●If the power supply fan does not spin or the
LED does not illuminate (see 
Testingpower supply on page...

ProblemCauseSolution
Cannot format diskette.Invalid media reported.When formatting a disk in MS-DOS, you might need to
specify diskette capacity.
For example, to format a 1.44-MB diskette, enter the
following command at the MS-DOS prompt: FORMAT
A: /F:1440
A problem has occurred with a disk
transaction.The directory structure is bad,
or there is a problem with a file.1.Right-click Start, select Explore, and then select a
drive.
2.Select File>Properties>Tools.
3.Under Error-checking, select Check Now....

ProblemCauseSolution
Drive not found (identified).Improper cable connectionOn workstations with discreet data and power cables,
ensure that the data and power cables are securely
connected to the hard drive. (See the Hard drive section of
this guide for connection details.)
Improperly seated hard driveOn systems with blind-mate drive connections, check for
connector damage on the drive and in the chassis.
Reseat the hard drive and its carrier in the chassis to
ensure a proper connection. (See the Hard...