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pigoo3

 
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Member Since: May 20, 2008
Location: U.S.
Posts: 27,238
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Mac Specs: 13" MB 2.4ghz, 2gig ram, OS 10.7.5

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Sometimes the first major step is to figure out if the problem is hardware or software related.

One way to be more confident whether it is hardware or software is to boot the computer from a different storage device with a fresh install of the Mac OS. This way you eliminate any possible interferences from other software installs. I usually do this from an external USB hard drive.

If the problem still persists when booting the computer from a secondary storage source...then this would certainly strongly point towards the problem being hardware. And if it is hardware...then you definitely want to get it fixed via Apple & Applecare.

But if it actually is software related. Then this could help explain why Apple couldn't find anything. Hardware problems are easier to find via the testing software Apple has. Software problems are harder.

By the way. Whenever I have a problem...two things I like to do are...an NVRAM and SMC reset:

About NVRAM and PRAM
Intel-based Macs: Resetting the System Management Controller (SMC)

Sometimes these resets can eliminate problems you normally wouldn't expect. That's why I do them.

HTH,

- Nick

- Computer slow, too many "beachballs", read this: Beachballs
- Computer seems slower than it used to? Read this for some speedup tips: Speedup
- Almost full hard drive? Some solutions. Out of Space
- Apple Battery Info. Battery
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