Troubleshooting Guide www.hp.com/in 8-18
Troubleshooting
Diagnostic Front Panel LEDs and Audible Codes
Activity
Blue Power LED On.
Blue Power LED flashes
every two seconds.
CPU Fan weak (RPM <
1000) or not turning,
Display Warning message
and Long Beep for 5 sec
and shut down.
System Fan not turning,
Display Warning message
and Long Beep for 5 sec
and shut down
Blue Power LED flashes
five times, one every
second, followed by a 2
second pause. Also 5
simultaneous beeps will
be heard.
Possible Cause
Computer on.
Computer in
Suspend to RAM
mode (some models
only) or normal
Suspend mode.
Processor thermal
protection activated:
A fan may be
blocked or not
turning. OR The
heatsink/fan
assembly is not
properly attached to
the processor.
Thermal protection
activated: System fan
may be blocked or
not turning. OR The
system fan is not
properly connected
to the system board.
Pre-video memory
error.
Recommended Action
None
Press any key or move the
mouse to wake the computer.
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.
1. Open hood, press power
button, and see if the
system fan spins. If the
system fan is not spinning,
make sure the fan's cable is
plugged onto the system
board header.
2. Ensure that no foreign
objects are stuck in the
System Fan.
3.If still it does not spins,
replace the the System fan
or contact an authorized
reseller or service provider
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.
Beeps
None
None
2
2