Service Guide

Information panel System Error LED

The System Error LED is switched on when an error is detected. If the System Error LED is on, remove the cover and check the diagnostic panel LEDs (in the upper right corner of the system board). Table 10 is a complete list of diagnostic panel LEDs and the suggested action.

Note:If a diagnostic panel LED is on and the information LED panel system error LED is off, there is probably an LED problem. Run the light-panel diagnostics by pressing F2 (see Light-path diagnostics).

Notes:

  1. To locate the LEDs on the processor board see "System board".
  2. Check the System Error Log for additional information before replacing a part.
  3. The DIMM error LEDs, processor error LEDs, and VRM error LEDs turn off when the system is switched off.

Table 10 describes panel system error LED settings, their meanings, and suspected parts/suggested actions.

Table 10. Panel system error LED settings
Diagnostic Panel LED Meaning Suspected Part/Suggested Action
All LEDs off The System Error Log is 75% full. Suggested actions:
  1. Clear the log
  2. PFA alert
    1. Clear PFA alert
    2. Remove ac power for at least 20 seconds
    3. Reconnect
    4. Switch on the system
  3. Run Information Panel diagnostics
CPU LED is on The LED next to the failing CPU should be on. Suspected parts:
  1. Processor 1 or 2
  2. Processor/PCI Board
VRM LED is on The LED next to the failing VRM should be on. Suspected parts:
  1. Voltage regulator module indicated by the VRM LED on the processor board that is switched on
  2. Processor/PCI Board
  3. Processor indicated by the Processor LED
DASD1 LED is on The LED located next to the drive bay that the failing drive is installed in should be on.
Note:This light is not on because the onboard SCSI is disabled.

Suspected parts:

  1. SCSI Backplane
  2. Failing drive: SCSI channel A has failed (This is the SCSI channel for the hot-swap hard disk drives)
Suggested actions:
  1. Check amber drive LED for failing hard drive
  2. Ensure that the fans are operating correctly and the air flow is good
DASD2 LED is on The LED located next to the drive bay that the failing drive is installed in is on.
Note:This light is not on because the onboard SCSI is disabled.

Suspected parts:

  1. SCSI Backplane
  2. Failing drive: SCSI channel B has failed
Suggested actions:
  1. Check amber drive LED for failing hard drive
  2. Ensure the fans are operating correctly and the air flow is good
FAN LED is on
Suspected parts:
  1. Fan Cable
  2. Processor/PCI Board
  3. System Board
  4. Power Backplane Board

Suggested actions:

  1. Check individual fan LEDs
  2. Replace respective fan
MEM LED is on The LED next to the failing DIMM is on. Suspected parts:
  1. Failing DIMM in slot J1 - J4
  2. Processor/PCI Board
NMI LED is on
Suggested actions:
  1. Reboot the system
  2. Check the System Error Log
PCI A LED is on
Suspected parts:
  1. PCI Card in slot 5
  2. Processor/PCI Board
  3. System Board

Suggested action:
Remove all PCI adapters from slots 1-5

PCI B LED is on
Suspected parts:
  1. System Board
  2. Processor/PCI Board
  3. Card in slots 3-5

Suggested action:
Remove all PCI adapters from slots 1-5

PCI C LED is on
Suspected parts:
  1. Processor/PCI Board
  2. I/O Legacy Board

Suggested action:
Remove all PCI adapters from slots 1-5
PS1 LED is on

Suspected part:
Power Backplane

Suggested action: Check the DC Power LED on power supply 1. If it is off, replace power supply 1.

PS2 LED is on
Suspected part:
Power Backplane

Suggested action: Check the DC Power LED on power supply 2. If off, replace power supply 2.

OVER LED is on
Suggested action: Check for a faulty adapter or remove the optional devices from the appliance.
SMI LED is on
Suggested action: Reboot the system
TEMP LED is on Look at the test cases. Suspected parts:
  1. Processor/PCI Board
  2. I/O Legacy Board

Suggested actions:

  1. Ambient temperature is within normal operating specifications. See Appendix E, "Specifications".
  2. Ensure that fans are operating correctly.
  3. Examine the System Error Log.
    1. System is over the recommended temperature.
      1. Information LED Panel.
      2. I/O Legacy Board.
    2. DASD is over the recommended temperature (the DASD LED is also on).

      1. Overheating hard drive
      2. DASD Backplane.
      3. I/O Legacy Board.
    3. System is over the recommended temperature for CPU X (where X is CPU 1, 2, 3, or 4) (CPU LED also on).
      1. CPU X.
      2. Processor/PCI Board
    4. The I/O Legacy Board is over the recommended temperature.
  4. If the CPU LED on the diagnostics panel is also on, one of the microprocessors has caused the error.

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