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Yesterday I was using Microsoft Excel 2011 to do my accounts and the screen suddenly went black. I tried restarting but this did not solve the problem.

I have connected to another monitor (also Mac) by mini thunderbolt and am now able to view my files/ run backup/ etc., so all the files are safe.

My question is: What has caused this failure?? If I knew the cause I am sure I could fix it myself.

I have tried the suggestions on several apple forums including:

  1. Resetting the System Management Controller.
  2. Resetting PRAM.
  3. Checking brightness controls.

For example: http://osxdaily.com/2014/11/22/fix-macbook-pro-booting-black-screen/

This is a MacBook Pro (13-inch, Mid 2012) running Yosemite 10.10.5. It is out of warranty and I have had no response from apple support.

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Disclaimer: Although I have a Mac I am not an expert!

If I was in your position, I would take a look at the console logs and do further research on root cause from here.

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  • Ok, I have done that, but what should I be looking for?
    – Matthew
    Jun 26, 2016 at 15:41

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