A–12 www.hp.com Troubleshooting Guide
POST Error Messages
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 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 (select
models only) or
normal Suspend
mode.
None
Green Power
LED flashes four
times, once per
second.
None Computer in
Suspend
to Disk or
“Hibernate” mode.
None
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