User`s guide

Xserve Troubleshooting - 13
Startup Symptom Charts
16. Replace the logic board. Note: When installing the new logic board, make sure the
ports and ID button on the back of the board align with the openings in the chassis.
Memory error message appears on the screen
1. Reseat the DIMMs.
2. Verify that the correct SDRAM DIMMs are installed.
3. Run Apple Hardware Test. If the test finds bad memory, replace the DIMMs one at a
time and test until all bad DIMMs are replaced with known-good modules.
Flashing question mark appears on the screen
1. Reseat the drive module in the first drive bay.
2. Start up from the system restore CD and check to see if the hard drive shows up on
the desktop. If it does, go to step 3. If it does not, go to step 5.
3. Run Disk Utility. Update the driver and restart the server.
4. Reinstall system software using the system restore CD that came with the server.
5. Replace the drive module in the first drive bay.
6. Replace the ATA controller board.
Server begins to power up, the blowers and hard drive are spinning, the
power LED is lit, but there are no activity lights or video
1. Verify that the system ID button on the back of the logic board aligns with the
opening in the chassis back panel. If it does not, realign the logic board.
2. Reset the logic board. Refer to “Resetting the PMU on the Logic Board” in this
chapter.
3. Reseat the processor module.
4. Verify all PCI and AGP cards are seated properly.
5. Replace the processor module.
6. Replace the logic board. Note: When installing the new logic board, make sure the
ports and ID button on the back of the board align with the openings in the chassis.
Server begins to power up, but won’t boot, and top row of activity LEDs
continue to light in sequence left to right and then right to left
1. Verify that the system ID button on the back of the logic board aligns with the
opening in the chassis back panel. If it does not, realign the logic board.
2. Reset the logic board. Refer to “Resetting the PMU on the Logic Board” in this
chapter.
3. Xserve (Slot Load and Cluster Node): Remove the front bezel and make sure the front
system IDbutton is not stuck. Reseat the button if necessary.