HP dx2200 - Microtower PC Service & Reference Manual page 114

Troubleshooting Without Diagnostics
POST Diagnostic Front Panel LEDs and Audible Codes
This section covers the front panel LED codes as well as the audible codes that may occur before
or during POST that do not necessarily have an error code or text message associated with them.
✎
If you see flashing LEDs on a PS/2 keyboard look for flashing LEDs on the front panel of the
computer and refer to the following table to determine the front panel LED codes.
✎
Recommended actions in the following table are listed in the order in which they should be
performed.
Diagnostic Front Panel LEDs and Audible Codes
Activity
Green Power LED
On.
Green Power LED
flashes every two
seconds.
Power LED flashes
every four seconds.
Power LED flashes
five times, once
every second,
followed by a two
second pause.
E–26
Beeps Possible Cause
None Computer on.
None Computer in
Suspend to RAM
mode (some
models) or normal
Suspend mode.
None Processor thermal
protection
activated:
A fan may be
blocked or not
turning.
OR
The heatsink/fan
assembly is not
properly attached
to the processor.
None Pre-video memory
error.
415606-001
Recommended Action
None
None required. 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. 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.
Service Reference Guide, dx2200 MT