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How do i know if my logic board is dead?

I have an iMac 27 When i turn it on it chimes and shows a wihite screen and it can stay like that for hours this happened while installing windows 7 thru bootcamp any help would be appreciated.

iMac

Posted on May 6, 2012 1:04 PM

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Posted on May 6, 2012 1:08 PM

Your logic board is probably OK. Try holding down the Option key when you hear the start up tone and also carefully reading Gray screen appears during startup .

12 replies

May 8, 2012 5:31 AM in response to RRFS

The wireless board will get it's signal during the startup sequence, that is why I asked him to begin holding down the Option key when he heard the startup tone. If he holds it down before the startup tone then the iMac won't get the signal.


My suggestiont to the OP is to use a wire USB keyboard. If after using a wired USB keyboard and he still has the same issue then he should run Apple Hardware Test in Extended Mode. This is the most comprehensive test he has available to him, if he cannot run it or gets error codes when he does then it's off to the Apple Store or AASP for a repair.

How do i know if my logic board is dead?

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