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Helpful answers
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Mar 3, 2016 1:16 AM in response to puntozvizby D.Cohen,Take a look at the steps suggested by Apple in this article:
If your Mac won't turn on - Apple Support
Try Safe Boot:
- Shut down your Mac
- Wait until your computer turns off and after that press the Power button
- Right after you hear the startup tone, press and hold the Shift key
- Release the Shift key when you see a grey Apple sign and the progress bar below this sign
- After your Mac boots up, restart it as you usually do.
Apart from that, take a look at this Apple article and follow the instructions on Resetting NVRAM shown there: How to Reset NVRAM on your Mac - Apple Support
Try resetting the System Management Controller: https://support.apple.com/en-us/HT201295
Hope this helps! -
Mar 3, 2016 1:27 AM in response to D.Cohenby puntozviz,but, it isn't powering on. it just shut off and now nothing... thanks!
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Mar 3, 2016 5:58 AM in response to puntozvizby Timothy Fink,Do you have another outlet to plug it into? Perhaps one problem may be your placement of the computer. Is it where it can be properly ventilated? Is it sharing power with lots of other items on one circuit? Try it out on an electrical circuit that is fairly unburdened.
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Mar 3, 2016 12:13 PM in response to Timothy Finkby puntozviz,Hi, thanks! It was plugged in along with my speakers and hard drives. I will buy one extension cable and plug it in into another outlet. Thank you.