Power Macintosh G4 MDD Noise Reduction Kits not doing their job?

While the majority of readers have reported that Apple's newly shipping US$ 19.95 Power Supply Replacement Kit - intended to reduce noise generated by Power Macintosh G4 MDD models - dramatically reduces noise, we are receiving sporadic indications of gradually increasing noise levels after installing the kit.

Mashall Marlowe writes:

"4/6//03: I just installed the new power supply and fan in my G4 867 Dual. What a difference! Silence! The noisiest sounds at boot are the hard drives. Now lets hope Apple can do as well fixing 10.2.4 and Safari."

"Things have changed in 24 hours.

"4/7/03: The noise level has changed drastically. It is now much noisier. There is a throbbing, grinding sound from the fans, and the air flow is much reduced. The noise from the fans waxes and wanes - noisy, then quiet - apparently in concert with the fan speed."

We are attempting to determine whether or not an installation error could be at fault in some of these relapse cases.

Feedback on this issue? Late-breakers@macfixit.com.

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