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Apple silences beeps, hissing

The company says it has fixed a noise issue with some of its dual-processor Power Mac G5s, a frequent topic of discussion recently on its support site.

Apple Computer confirmed this week that there was a noise issue with some of its dual-processor Power Mac G5 models and said the issue has been fixed for new machines rolling off the production lines.

The problem, which appeared on dual 1.8GHz machines, created a beeping or hissing noise on some machines when used in conjunction with professional external audio gear, according to reports on Macintosh enthusiast sites including Think Secret and Macworld UK. The issue has also been a frequent topic of discussion on Apple's support site.

An Apple representative told CNET News.com that a "small number" of customers have experienced the problem, which has been fixed in production. The company said any customers experiencing the issue should contact the company's customer support.

Some consumers reported that a new power supply helped either reduce or eliminate the noise problem.

Apple introduced the dual 1.8GHz machines last November.

The Power Mac line has had some noise issues in the past. Last February, Apple started a program that allowed owners of some mirrored-door PowerMac G4 machines to get a replacement fan and power supply that were designed to quiet the machines.