HP RP7 Hardware Reference Guide HP RP7 Retail System Model 7800 - Page 73

Interpreting POST Diagnostic Front Panel LEDs and Audible Codes

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Table A-1 Diagnostic Front Panel LEDs and Audible Codes (continued) Activity Beeps Possible Cause Recommended Action Power LED flashes 12 times, 12 once every second, followed by a two second pause. Beeps stop after third iteration and the computer reboots. Health timer expired. None. System does not power on and LEDs are not flashing. None System unable to power on. Press and hold the power button for less than 4 seconds. If the hard drive LED turns green, the power button is working correctly. Replace the system board. OR Press and hold the power button for less than 4 seconds. If the hard drive LED does not turn on green then: 1. Check that the unit is plugged into a working AC outlet. 2. Ensure that the DC power cable is plugged into the I/O panel. 3. Replace the power supply. Interpreting POST Diagnostic Front Panel LEDs and Audible Codes 67

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Table A-1
Diagnostic Front Panel LEDs and Audible Codes (continued)
Activity
Beeps
Possible Cause
Recommended Action
Power LED flashes 12 times,
once every second, followed
by a two second pause.
Beeps stop after third iteration
and the computer reboots.
12
Health timer expired.
None.
System does not power on
and LEDs are not flashing.
None
System unable to power
on.
Press and hold the power button for less than 4
seconds. If the hard drive LED turns green, the
power button is working correctly. Replace the
system board.
OR
Press and hold the power button for less than 4
seconds. If the hard drive LED does not turn on
green then:
1.
Check that the unit is plugged into a
working AC outlet.
2.
Ensure that the DC power cable is plugged
into the I/O panel.
3.
Replace the power supply.
Interpreting POST Diagnostic Front Panel LEDs and Audible Codes
67