Appendix A Troubleshooting; Interpreting Post Diagnostic Front Panel Leds And Audible Codes - HP RP2 Hardware Reference Manual

A Troubleshooting
Interpreting 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.
WARNING!
the system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be
sure to disconnect the power cord from the wall outlet and allow the internal system components to
cool before touching.
NOTE: 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.
Not all diagnostic lights and audible codes are available on all models.
Table A-1 Diagnostic Front Panel LEDs and Audible Codes
Activity
Green Power LED On.
Green Power LED flashes.
Red Power LED flashes two
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
Red Power LED flashes three
times, once every second,
followed by a two second
pause. Beeps stop after fifth
iteration but LEDs continue
until problem is solved.
Red Power LED flashes four
times, once every second,
followed by a two second
pause. Beeps stop after fifth
When the computer is plugged into an AC power source, voltage is always applied to
Beeps
None
None
2
3
4

Interpreting POST diagnostic front panel LEDs and audible codes

Possible Cause
Computer on.
Computer in Suspend to
RAM mode (some models
only) or normal Suspend
mode.
Processor thermal
protection activated:
Fan may be blocked or
not turning.
OR
The heatsink/fan
assembly is not properly
attached to the processor.
Processor not installed
(not an indicator of bad
processor).
Power failure (power
supply is overloaded).
Recommended Action
None
None required. Press any key if a keyboard is
attached or move the mouse if a mouse is
attached to wake the computer. You can also
wake the computer by pressing the power button
or tapping the touch screen.
1. Ensure that the computer air vents are not
blocked and the fan is running.
2. Open the cover, press the power button,
and see if the fan spins. If the fan is not
spinning, make sure the fan's cable is
plugged onto the system board header.
3. If the fan is plugged in, but is not spinning,
then replace heatsink/fan assembly.
4. Contact an authorized reseller or service
provider.
1. Check to see that the processor is present.
2. Reseat the processor.
1. Ensure the DC power cable is plugged into
the I/O panel.
2. Check if a device is causing the problem by
removing ALL attached devices (such as a
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