HP Dc5700 HP Compaq dc5700 Business PC Service Reference Guide, 1st Edition - Page 164

Continued, Check that both power supply cables

Page 164 highlights

POST Error Messages POST Diagnostic Front Panel LEDs and Audible Codes (Continued) Activity System does not power on and LEDs are not flashing. Beeps None Possible Cause System unable to power on. Recommended Action Press and hold the power button for less than 4 seconds. If the hard drive LED turns green, the power button is working correctly. Try the following: 1. Check that the voltage selector (some models), located on the rear of the power supply, is set to the appropriate voltage. Proper voltage setting depends on your region. 2. 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. Open hood and check that the power button harness is properly connected to the system board. 3. Check that both power supply cables are properly connected to the system board. 4. Check to see if the 5 V_aux light on the system board is turned on. If it is turned on, then replace the power button harness. 5. If the 5 V_aux light on the system board is not turned on, remove the expansion cards one at a time until the 5 V_aux light on the system board turns on. If the problem persists, replace the power supply. C-12 437804-001 Service Reference Guide, dc5700

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C–12
437804-001
Service Reference Guide, dc5700
POST Error Messages
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. Try the following:
1. Check that the voltage selector (some
models), located on the rear of the
power supply, is set to the appropriate
voltage. Proper voltage setting
depends on your region.
2. 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. Open hood and check that the power
button harness is properly connected
to the system board.
3. Check that both power supply cables
are properly connected to the system
board.
4. Check to see if the 5 V_aux light on
the system board is turned on. If it is
turned on, then replace the power
button harness.
5. If the 5 V_aux light on the system
board is not turned on, remove the
expansion cards one at a time until
the 5 V_aux light on the system board
turns on. If the problem persists,
replace the power supply.
POST Diagnostic Front Panel LEDs and Audible Codes
(Continued)
Activity
Beeps
Possible Cause
Recommended Action