HP RP2 Hardware Reference Manual page 41

Table A-1 Diagnostic Front Panel LEDs and Audible Codes (continued)
Activity Beeps Possible Cause
Interpreting POST diagnostic front panel LEDs and audible codes
Recommended Action
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.
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