Macintosh Server G4: Power Supply Needs Replacement Alert Box

On a small number of Macintosh Server G4 computers an alert box with a message that says the power supply needs to be replaced may appear. This document provides more information on the root cause of this alert.
Symptom

An alert box with this message appears:




Figure 1 Redundant power supply alert


Solution

This alert box is likely to appear when server computers have no additional PCI cards or hard drives installed in them. In this configuration, there is not enough current draw on the +5 V line and the power supply reports this low current situation to the Mac OS. This, however, does not indicate there is an issue with the power supply.

If this alert appears on your server computer, and it is otherwise working normally, you may ignore this alert. Installing additional PCI cards or hard drives will provide additional load against the power supply and remove the likelihood that the alert box will appear.

If this is not possible, contact your Apple Authorized Service Provider for additional details.
Published Date: Feb 20, 2012