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! When the computer is plugged into an AC power source, voltage is always applied to 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-1Diagnostic Front Panel LEDs and Audible Codes

Activity

Beeps

Possible Cause

Recommended Action

 

 

 

 

Green Power LED On.

None

Computer on.

None

 

 

 

 

Green Power LED flashes.

None

Computer in Suspend to

None required. Press any key if a keyboard is

 

 

RAM mode (some models

attached or move the mouse if a mouse is

 

 

only) or normal Suspend

attached to wake the computer. You can also

 

 

mode.

wake the computer by pressing the power button

 

 

 

or tapping the touch screen.

Red Power LED flashes two

2

Processor thermal

times, once every second,

 

protection activated:

followed by a two second

Fan may be blocked or

pause. Beeps stop after fifth

not turning.

iteration but LEDs continue

 

until problem is solved.

OR

 

 

The heatsink/fan

 

assembly is not properly

 

attached to the processor.

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.

Red Power LED flashes three 3 times, once every second, followed by a two second pause. Beeps stop after fifth iteration but LEDs continue

until problem is solved.

Processor not installed

1.

Check to see that the processor is present.

(not an indicator of bad

2.

Reseat the processor.

processor).

ENWW

Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 61

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HP RP7 7800 Base Model manual Troubleshooting
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RP7 7800 Base Model, RP7 7800 specifications

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