Power supply LED errors - (NF 8500R - Type 8681)


Power supply LED errors

Use the power supply LED information to trouble shoot power supply problems.

Note:

The minimum configuration required for the DC Good light to come on is:

I/O Board
Midplane
Power Control Card
Processor Controller Card
Memory Carrier
128MB DIMM
Power Supply (one or more)


  -Important-

If you cannot power the system off with the front panel switch:

  1.  If ACPI is enabled (operating system dependant), you must hold the power button for 5 seconds.
  2.  Disconnect the AC power.
  3.  Remove the I/O function card.
  4.  Remove the battery on the I/O Function card.
  5.  On the I/O function card, move J15 jumper from pins 1 and 2 to pins 2 and 3.
  6.  Wait a minimum of five minutes.
  7.  On the I/O function card, move J15 jumper back from pins 2 and 3 to pins 1 and 2.
  8.  Reinstall the battery on the I/O function card.
  9.  Reinstall the I/O function card in the server.
  10.  Restore AC power to the server.
  11.  Power-on the server.
  12.  Reconfigure the server using the configuration/setup utility.


Table 15. Power Supply LED Errors 

AC
Good
LED
DC
Good
LED
Error FRU/Action
Off Off No power to system or
a problem with the ac
power source.
1. Check ac power source.
2. Power Supply
3. Midplane
4. Power Control Card
On Off Standby mode or dc
problem.
Go to (below)
'AC LED on/DC LED off'
On On Power is OK None


AC LED on/DC LED off: If the AC LED is on and the DC LED is off, do the following:

  1.  Check the Power Control Card LED, then return to this table.
     See 'Power control card LED').
  2.  Attempt to start the system and check the DC Good LEDs.
  3.  If the Good AC LED on and DC Good LED off condition does not exist on all power supplies, move  the power supply with the DC Good LED off to one of the other power supply positions.
     If the DC Good LED off condition stays with the power supply, replace FRUs in the following order:

    1.  Power supply
    2.  Power control card
    3.  Midplane

     If the DC Good LED off condition stays with the power supply position, replace FRUs in the following  order, then go to (below) step 10.

    1.  Power control card
    2.  Midplane

  4.  If the condition exists on all the power supplies, disconnect the AC power from all supplies for 30  seconds, then reconnect AC power and attempt to start the system.
     Check the LEDs again.
     If DC Good LEDs are lit on all power supplies, continue with system checkout. If not, continue with step 5.
  5.  Disconnect the ac power and reduce the system to the minimum configuration described in the note at  the beginning of this section.
  6.  Install a jumper on J11 on the I/O Board (see 'I/O board component locations').
  7.  Connect the AC power cord and attempt to start the system. Check the DC Good LED.
  8.  If the DC Good LED is on, reinstall the components in the following order to isolate the failing FRU:

    1.  I/O Function Card
    2.  Front Panel (once installed, jumper J11 on the I/O board is no longer needed).
    3.  System management adapter
    4.  All remaining components, one at a time.

  9.  If the DC Good LED is off, swap power supplies.
     If the DC Good LED is still off, replace FRUs in the following order, then go to (above) step 10.

    1.  Power control card
    2.  Midplane
    3.  I/O planar
    4.  Power supply

     If the DC Good LED is on after swapping power supplies, replace the power supply that was removed,  then go to step 10.

  10.  Once the failing FRU has been replaced, re-install all remaining FRUs, and continue with the system checkout.


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