Troubleshooting Guide

A–16 www.hp.com Troubleshooting Guide
POST Error Messages
Red Power LED
flashes seven times,
once every second,
followed by a two
second pause.
7 System board
failure (ROM
detected failure
prior to video).
Replace the system board.
Red Power LED
flashes eight times,
once every second,
followed by a two
second pause.
8Invalid ROM
based on bad
checksum.
1. Reflash the ROM using a ROMPaq
diskette. See the “ROM Flash”
section of the Desktop
Management Guide on the
Documentation CD.
2. Replace the system board.
Red Power LED
flashes nine times,
once every second,
followed by a two
second pause.
9System powers on
but is unable to
boot.
1. Check that the voltage selector,
located on the rear of the power
supply (some models), is set to the
appropriate voltage. Proper voltage
setting depends on your region.
2. Replace the system board.
3. Replace the processor.
Red Power LED
flashes ten times,
once every second,
followed by a two
second pause.
10 Bad option card. 1. Check each graphics card by
removing the card (one at a time if
multiple cards), then power on the
system to see if fault goes away.
2. Once a bad card is identified,
remove and replace the bad option
card.
3. Replace the system board.
Diagnostic Front Panel LEDs and Audible Codes (Continued)
Activity Beeps Possible Cause Recommended Action