The Power Mac G4 computer beeps twice at startup. Two beeps means that incompatible RAM types may be installed.

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 Power Mac G4 computer beeps twice at startup.

Products affected

• Power Mac G4
• Macintosh Server G4
• Macintosh Server G4 with Mac OS X Server

1. Verify that only PC-100 SDRAM DIMMs are installed and not EDO memory.

2. Replace the existing SDRAM one DIMM at a time with known-good PC-100 SDRAM DIMMs.

3. Reseat processor module and try again.

4. Replace processor module and try again.

5. Replace logic board.