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Reduce buzzing in certain MacBook and MacBook Pros
Authored by: donnarshmr2 on Aug 27, '07 09:49:39AM

I suffered from this problem from a week after the release of the MacBook Pros until about 2 weeks ago. I tried all of these hints at one point or another. QuietMBP was my favorite until an Apple software update caused it to stop working. Speaking as someone who used the technique daily, disabling CPU2 in the Processor PrefPane of CHUD tools will in reality cause the MBP to run significantly hotter AND get signifigantly worse battery life. That's entirely counterintuitive, but that's the way it works.

However, about 2 weeks ago, I called AppleCare, described the problem to them including such tidbits as it'll shut up if the CPUs are loaded, shut up if you turn CPU2 off, etc. The laptop flew off to TX on Wednesday afternoon and was back in my hands on Friday morning. The work order in the box said the mail logic board had been replaced. While I still won't call the laptop silent when on battery, it's no so quiet that I don't hear the buzz unless I specifically listen for it in a VERY quiet place.

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Reduce buzzing in certain MacBook and MacBook Pros
Authored by: r-spx on Aug 27, '07 10:19:35AM

I would try contacting Apple but it's the hassle of convincing them of what seems a minor fault. What will probably happen is that they'll take it away for a few weeks and then tell me there's nothing they can do. Then I'll have to argue, and it's just too much trouble. This was my experience with my iBook's dim screen.

Plus, I hear that people have had their logic boards replaced and the problem has persisted. Additionally, somebody on another forum pointed out that this is an issue with all dual-core chips made by Intel, and affects Windows laptops too.

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