The computer is making a clicking, chirping, thumping or rubbing noise.

This article covers repair procedures for authorized service providers on selected Apple products, but we have published them in the Knowledge Base for the general public for educational purposes. At this time, there are a limited number of repairs that a customer can perform and these are covered under the customer installable parts program http://www.info.apple.com/installparts . If you have not been authorized to perform these procedures, please contact Apple (800-APL-CARE in the USA) or your local authorized service provider to schedule a repair.

Symptom

The computer is making a clicking, chirping, thumping or rubbing noise.

Products affected

• Power Mac G4
• Macintosh Server G4

DANGER! This procedure exposes you to high voltages that can result in death or serious injury. DO NOT ATTEMPT THIS PROCEDURE IF YOU HAVE NOT BEEN CERTIFIED AS AN APPLE-AUTHORIZED TECHNICIAN.

1. Remove all PCI cards and test unit. If problem does not occur with cards removed, begin replacing cards one at a time to determine which card is causing problem. Replace problem card with known-good card.

2. Remove media from drives and verify noise is gone. Replace media.

3. Verify no cables are caught in fan.

4. Disconnect fan and verify noise is gone. Replace fan.

5. Reseat the CD-ROM/Zip drive carrier.

6. Disconnect power cable to all drives. Reconnect drives one at a time. Replace problem drive.

7. Replace power supply.

8. Replace video card.

9. Replace logic board.

10. Replace processor module.