HP vc4815 Service Reference Guide:HP Compaq vc4815 Thin Client - Page 17

Diagnostic Front Panel LEDs and Audible Codes, Possibl, e Cause, Beeps, & LED, blink, Activity,

Get HP vc4815 - Thin Client PDF manuals and user guides View all HP vc4815 manuals
Add to My Manuals
Save this manual to your list of manuals

Page 17 highlights

Diagnostic Front Panel LEDs and Audible Codes Possibl e Cause System unable to power on. Beeps & LED blink None Activity System does not power on and LEDs are not flashing. 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. Then, Replace the system board. OR If the hard drive LED does not turn on green then: 1. Check that the unit is plugged into a working AC outlet. 2. Check that both power supply cables are properly connected to the system board. 3. Check to see if the 5V_aux light on the system board is turned on. If it is turned on, then replace the power button harness. If the problem persists, replace the system board. 4. If the 5V_aux light on the system board is not turned on, remove the expansion cards one at a time until the 5V_aux light on the system board turns on. It the problem persists, replace the power adapter. ✎* Replacing the system board should ONLY be the last resort. * * Replacing the power supply should ONLY be the last resort. Service Reference Guide www.hp.com 4-2

  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
Diagnostic Front Panel LEDs and Audible Codes
Possibl
e Cause
Beeps
& LED
blink
Activity
Recommended Action
System
unable
to power
on.
None
System does
not power on
and LEDs are
not flashing.
Press and hold the power button for less than 4
seconds.
If the hard drive LED turns green, the power button
is working correctly. Then, Replace the system
board.
OR
If the hard drive LED does not turn on green
then:
1. Check that the unit is plugged into a working AC
outlet.
2. Check that both power supply cables are properly
connected
to the system board.
3. Check to see if the 5V_aux light on the system
board is turned on. If it is turned on, then replace
the power button
harness. If the problem persists, replace the system
board.
4. If the 5V_aux light on the system board is not
turned on, remove the expansion cards one at a
time until the 5V_aux light on the system board
turns on. It the problem persists, replace the power
adapter.
✎
*
Replacing the system board should ONLY be the last resort.
* * Replacing the power supply should ONLY be the last resort.
Service Reference Guide
www.hp.com
4-2