HP ProDesk 680 G6 PCI Micro Maintenance and Service Guide - Page 107

Interpreting POST diagnostic front panel lights and audible codes continued

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Table 7-2 Interpreting POST diagnostic front panel lights and audible codes (continued) Activity Beeps Possible cause Recommended action Red power light blinks nine times, 9 once every second, followed by a two-second pause. Beeps stop after fifth iteration, but lights continue until problem is solved. System turn on but cannot boot. 1. Unplug the power cord from the computer, wait 30 s, then plug the power cord back in to the computer. 2. Replace the system board. System does not turn on and lights are not blinking. None System cannot start. Press and hold the power button for less than 4 seconds. If the hard drive light turns white, 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 light does not turn on white then: 1. Be sure that the unit is plugged into a working AC outlet. 2. Replace the power supply. ENWW Interpreting POST diagnostic front panel lights and audible codes 99

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Table 7-2
Interpreting POST diagnostic front panel lights and audible codes (continued)
Activity
Beeps
Possible cause
Recommended action
Red power light blinks nine times,
once every second, followed by a
two-second pause. Beeps stop
after fifth iteration, but lights
continue until problem is solved.
9
System turn on but cannot
boot.
1.
Unplug the power cord from the computer, wait
30 s, then plug the power cord back in to the
computer.
2.
Replace the system board.
System does not turn on and
lights are not blinking.
None
System cannot start.
Press and hold the power button for less than 4
seconds. If the hard drive light turns white, 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 light does not turn on white
then:
1.
Be sure that the unit is plugged into a working
AC outlet.
2.
Replace the power supply.
ENWW
Interpreting POST diagnostic front panel lights and audible codes
99