TS3824: iMac (Mid 2011): Unresponsive white screen on startup or vertical lines on screen

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Q: I have a question mark ? on my screen. Computer is unresponsive

how do i download firmware if computer is unresponsive

Posted on Aug 20, 2012 2:38 PM

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Q: I have a question mark ? on my screen. Computer is unresponsive

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