HT202731: Using Apple Diagnostics

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Garry Lunn

Q: Hi I have a MAC pro retina.  This has happened before, when I turn on the start button, the logo lights up but there is no light to the screen.  I only see a black screen.

I have a MAC pro retina.  This has happened before.  When I push the start button the apple logo comes on but the screen remains black.  No way to run diagnostics as nothing can be seen.   I have tried PRAM and SCM to no avail

iPad, Mac OS X (10.7.4)

Posted on Jul 18, 2015 7:25 AM

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Q: Hi I have a MAC pro retina.  This has happened before, when I turn on the start button, the logo lights up but there is no li ... more

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