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Apple Desktops Discussion of Apple's desktop machines including Mac Pro, iMac, Power Mac, and mini

iMac freezes, displays lines, overheats


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Aeroshaft7

 
Member Since: Dec 02, 2009
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I am posting this for a friends iMac. After running multiple apps for about 15 minutes, it gets very warm, typically freezes (rainbow wheel spins forever), or there are horizontal lines that come across the screen.

Could this just be an overheating problem? Open and clean?
Replace Fan?
Video card or Processor going bad?

Thanks!
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cwa107

 
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I would tend to think one or more fans are seized. You should be able to verify by running the Apple Hardware Test:

http://support.apple.com/kb/HT1509

I would buy replacement fans, open it up, have some compressed air handy while you're replacing them. Good luck, the flat panel models (both the plastic and aluminum) are not particularly easy to work on.

Liquid and computers don't mix. It might seem simple, but we see an incredible amount of people post here about spills. Keep drinks and other liquids away from your expensive electronics!
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