System Status LEDs

Location

Name

Normal State

Indicates

DS9C3

SLEEP

ON (Red)

System is in sleep mode.

DS9C4

5VSTBY

ON

Power supply is providing trickle power.

DS9C5

EFI_GD

Normally OFF; only flashes during boot cycle

Normal sequence indicates control has passed from EFI operations to the OS. If light stays on after boot cycle, EFI is crashing.

DS9C6

VR_PWR

ON

System is powered on.

DS9C3:SLEEP

Important: The red DS9C3 LED warns that the Xserve is in sleep mode. When this LED is ON, do not remove or replace PCI expansion cards or FB-DIMMs, because the Xserve is still powered on.

DS9C4:5VSTBY

If the DS9C4 LED is OFF, do the following:

  • Check that the AC cord is connected to a working AC wall outlet.
  • Reseat the AC plug.
  • Reseat the power supply.
  • Replace the power supply.

DS9C5: EFI_GD

If the DS9C4 LED is OFF, do the following:

  • Reset PRAM.
  • Boot off an install disc.
  • If the system does not boot from the install disc, replace the logic board.
  • Replace the FB-DIMMs.
  • Reseat CPU A.
  • Reseat CPU B.
  • Replace CPU A.
  • Replace CPU B.

DS9C6: VR_PWR

If the DS9C6 LED is OFF, do the following:

  • Check for any signs of an obvious electrical short, e.g. metal screws or PCI card slot cover loose inside Xserve touching the logic board.
  • Reseat the power supply.
  • Replace the power supply.

CPU Status LEDs

Location

Name

Normal State

Indicates

DS9Cl

CPUB_OVERTMP

OFF

CPU B is operating at the right temperature.

DS9C2

CPUA_OVERTMP

OFF

CPU A is operating at the right temperature.

DS9C7

CPUB_HLTH

OFF

CPU B is operating correctly.

DS9CB

CPUA_HLTH

OFF

CPU A is operating correctly.

Note: Under normal operating conditions, the CPU status LEDs are all OFF; however, there may be exceptions. Refer to KnowledgeBase article ????

DS9C1: CPUB_OVERTMP and DS9C2: CPUA_OVERTMP

Note: These two LEDs can operate in two different modes; they will either flash or stay on. If either LED is flashing, it may indicate an initial processor over-temperature condition. If either LED is solidly on, it may indicate a chronic processor over-temperature condition. Initial processor over-temperature can cause symptoms such as sluggish Xserve performance. Chronic processor over-temperature can cause the Xserve to hang completely.

If DS9C1 or DS9C2 LED is ON, do the following:

  • Verify proper heatsink installation.
  • Verify all thermal sensors are properly connected.
  • Verify the fan array is operating properly.
  • Verify the airflow duct is properly in place and nothing is blocking its airflow. DS9C7: CPUB_HLTH and DS9C8: CPUB_HLTH

If DS9C7 or DS9C8 LED is ON, do the following:

  • With the Xserve booted, press the SYS_RST switch. If this turns off the LED, check for incompatible device driver software that may have been installed for added hardware.
  • If the LED is still on, power down the Xserve and try resetting the SMC. Restart the Xserve.
  • Reset the power supply by unplugging the AC cord for 20 seconds.
  • Unplug the AC cord and remove any added FB-DIMMs and PCI Express cards. If this causes the LED to go off, repopulate the FB-DIMMs and/or PCI Express cards to find the combination that caused the LED to come on. Overheated memory could be a possible cause for this LED to come on. Check fan array operation.
  • Unplug the AC cord and remove the battery for 10 seconds. Reinstall the battery, wait 5 seconds, and restart the Xserve.
  • Try swapping CPU A and CPU B locations. If the LED follows the CPU, replace that CPU.
  • Try replacing the logic board.

EFI POST LEDs

The four EFI POST LEDs, DS1-DS4, are tri-state colored LEDs that may be green, red, or amber. When the Xserve (Late 2006) is powered on, the four LEDs light up and display different patterns of colors. If the system hangs, record the color for each LED and contact AppleCare technical support to report the pattern.

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