Troubleshooting Guide

Troubleshooting Guide www.hp.com 2–31
Troubleshooting Without Diagnostics
Computer will not start. Wrong memory
modules were used in
the upgrade or memory
modules were installed
in the wrong location.
1. Review the documentation that
came with the system to
determine if you are using the
correct memory modules and to
verify the proper installation.
2. Observe the beeps and LED
lights on the front of the
computer. See Appendix A,
“POST Error Messages” to
determine possible causes.
3. If you still cannot resolve the
issue, contact Customer
Support.
Power LED flashes Red five
times, once every second,
followed by a two-second
pause, and the computer
beeps five times. The beeps
will repeat five times, but
the Power LED will continue
flashing until the problem is
resolved.
Memory is installed
incorrectly or is bad.
1. Reseat DIMMs. Power on the
system.
2. Replace DIMMs one at a time to
isolate the faulty module.
3. Replace third-party memory
with HP memory.
4. Replace the system board.
Power LED flashes Red six
times, once every second,
followed by a two-second
pause, and the computer
beeps six times. The beeps
will repeat five times, but
the Power LED will continue
flashing until the problem is
resolved.
Video card is not
seated properly or is
bad, or system board is
bad.
For systems with a graphics card:
1. Reseat the graphics card.
Power on the system.
2. Replace the graphics card.
3. Replace the system board.
For systems with integrated
graphics, replace the system board.
Solving Hardware Installation Problems (Continued)
Problem Cause Solution