HP Z4 Maintenance and Service Guide - Page 52

Troubleshooting without diagnostics, Safety and comfort, Before you call for technical support

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6 Troubleshooting without diagnostics This chapter provides information on how to identify and correct minor problems, such as USB devices, hard drive, graphics, audio, memory, and software problems. If you encounter problems with the computer, refer to the tables in this chapter for probable causes and recommended solutions. NOTE: For information on specific error messages that may appear on the screen during Power-On Self-Test (POST) at startup, refer to POST error messages and diagnostic front panel LEDs and audible codes on page 69. Safety and comfort WARNING! Misuse of the computer or failure to establish a safe and comfortable work environment may result in discomfort or serious injury. Refer to the Safety & Comfort Guide at http://www.hp.com/ergo for more information on choosing a workspace and creating a safe and comfortable work environment. For more information, refer to the Safety & Regulatory Information guide. Before you call for technical support If you are having problems with the computer, try the appropriate solutions below to try to isolate the exact problem before calling for technical support. ● Run the HP diagnostic tool. ● Run the hard drive self-test in Computer Setup. Refer to Computer Setup (F10) Utility on page 33 for more information. ● Check the Power LED on the front of the computer to see if it is flashing red. The flashing lights are error codes that will help you diagnose the problem. Refer to POST error messages and diagnostic front panel LEDs and audible codes on page 69 for more information. ● If the screen is blank, plug the monitor into a different video port on the computer if one is available. Or, replace the monitor with a monitor that you know is functioning properly. ● If you are working on a network, plug another computer with a different cable into the network connection. There may be a problem with the network plug or cable. ● If you recently added new hardware, remove the hardware and see if the computer functions properly. ● If you recently installed new software, uninstall the software and see if the computer functions properly. ● Boot the computer to the Safe Mode to see if it will boot without all of the drivers loaded. When booting the operating system, use "Last Known Configuration." ● Refer to the comprehensive online technical support at http://www.hp.com/support. ● Refer to Helpful hints on page 45 in this guide. To assist you in resolving problems online, HP Instant Support Professional Edition provides you with selfsolve diagnostics. If you need to contact HP support, use HP Instant Support Professional Edition's online chat feature. Access HP Instant Support Professional Edition at: http://www.hp.com/go/ispe. Access the Business Support Center (BSC) at http://www.hp.com/go/bizsupport for the latest online support information, software and drivers, proactive notification, and worldwide community of peers and HP experts. 44 Chapter 6 Troubleshooting without diagnostics

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6
Troubleshooting without diagnostics
This chapter provides information on how to identify and correct minor problems, such as USB devices, hard
drive, graphics, audio, memory, and software problems. If you encounter problems with the computer, refer
to the tables in this chapter for probable causes and recommended solutions.
NOTE:
For information on
specific
error messages that may appear on the screen during Power-On Self-Test
(POST) at startup, refer to
POST error messages and diagnostic front panel LEDs and audible codes
on page
69
.
Safety and comfort
WARNING!
Misuse of the computer or failure to establish a safe and comfortable work environment may
result in discomfort or serious injury. Refer to the
Safety & Comfort Guide
at
ergo
for
more information on choosing a workspace and creating a safe and comfortable work environment. For more
information, refer to the
Safety & Regulatory Information
guide.
Before you call for technical support
If you are having problems with the computer, try the appropriate solutions below to try to isolate the exact
problem before calling for technical support.
●
Run the HP diagnostic tool.
●
Run the hard drive self-test in Computer Setup. Refer to
Computer Setup (F10) Utility
on page
33
for
more information.
●
Check the Power LED on the front of the computer to see if it is
flashing
red. The
flashing
lights are error
codes that will help you diagnose the problem. Refer to
POST error messages and diagnostic front panel
LEDs and audible codes
on page
69
for more information.
●
If the screen is blank, plug the monitor into a
different
video port on the computer if one is available. Or,
replace the monitor with a monitor that you know is functioning properly.
●
If you are working on a network, plug another computer with a
different
cable into the network
connection. There may be a problem with the network plug or cable.
●
If you recently added new hardware, remove the hardware and see if the computer functions properly.
●
If you recently installed new software, uninstall the software and see if the computer functions properly.
●
Boot the computer to the Safe Mode to see if it will boot without all of the drivers loaded. When booting
the operating system, use “Last Known
Configuration.”
●
Refer to the comprehensive online technical support at
support
.
●
Refer to
Helpful hints
on page
45
in this guide.
To assist you in resolving problems online, HP Instant Support Professional Edition provides you with self-
solve diagnostics. If you need to contact HP support, use HP Instant Support Professional Edition's online chat
feature. Access HP Instant Support Professional Edition at:
go/ispe
.
Access the Business Support Center (BSC) at
go/bizsupport
for the latest online support
information, software and drivers, proactive
notification,
and worldwide community of peers and HP experts.
44
Chapter 6
Troubleshooting without diagnostics