Troubleshooting Guide
www.hp.com
2–11
Troubleshooting
Diagnostic Front Panel LEDs and Audible Codes
Activity
Beeps
Recommended Action
Green Power LED On.
None
None
Green Power LED flashes
every two seconds.
None
Not support wake up by mouse/keyboard.
Should be Press Power button.
CPU Fan weak
(RPM < 1000) or not
turning, Display
Warning message and
Long Beep for 5 sec and
shut down.
System Fan weak
(RPM < 1000) or not
turning, Display
Warning message and
Long Beep for 5 sec and
shut down.
2
1. Ensure that the computer air vents are not blocked
and the processor cooling fan is running.
2. Open hood, press power button, and see if the
processor fan spins. If the processor fan is not
spinning, make sure the fan's cable is plugged
onto the system board header. Ensure the fan is
fully/properly seated or installed.
3. If fan is plugged in and seated properly, but is not
spinning, then replace processor fan.
4. Reseat processor heatsink and verify that the fan
assembly is properly attached.
5. Contact an authorized reseller or service provider.
Red Power LED flashes
five times, one every
second, followed by a 2
second pause. Also 5
simultaneous beeps will
be heard.
5
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.
Red Power LED flashes 6
times, one every second,
followed by a 2 second
pause. Also 6
simultaneous beeps will
be heard.
6
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.
Red Power LED flashes 8
times, one every second,
followed by a 2 second
pause. Also 8
simultaneous beeps will
be heard.
8
1. Reflash the system ROM with the latest BIOS
image.
2. Replace the system board.
