HP COMPAQ DX2718 MT - Manual (Page 102)

D–22 483941-001 Service Reference Guide
Troubleshooting Without Diagnostics
Diagnostic Front Panel LEDs and Audible Codes
Diagnostic Front Panel LEDs and Audible Codes
Activity Beeps Possible Cause Recommended Action
Green Power LED
On. None Computer on. None
Green Power LED
flashes every two
seconds. None Computer in
Suspend to RAM
mode (some
models only) or
normal Suspend
mode. Not support wake up by mouse/
keyboard.
Should be Press Power button.
CPU Fan weak
(RPM < 600) or not
turning, Display
Warning message
and Long Beep for
5 sec and shut
down.
System Fan weak
(RPM < 600) or not
turning, Display
Warning message
and Long Beep for
5 sec and shut
down. 2 Processor thermal
protection
activated:
A fan may be
blocked or not
turning.
OR
The heatsink/fan
assembly is not
properly attached
to the processor. 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 Pre-video memory
error. 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 Pre-video graphics
error. 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.