mac going into sleep mode for no reason

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Level 1

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mac going into sleep mode for no reason

my mac is playing up. Every time I open it, the screen will appear briefly then flash off as if I have put it on sleep mode. When I close the top and re-open it it does the same thing again, sometimes it works for a while, but will turn itself off again after a few mintues.

I have tried charging it, turning it off etc and nothing seems to be working. Does anyone know what this means and could help me please?

MacBook

Posted on Oct 25, 2012 9:05 AM

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Answer 1

John Galt

Level 10

141,144 points

Oct 25, 2012 9:24 AM in response to bmac117

Problems related to unexpected system sleep, shutdown, lights or fans call for an SMC reset:

Resetting the System Management Controller (SMC)

Resetting the SMC on Mac portables with a battery you can remove

Shut down the computer.
Disconnect the MagSafe power adapter from the computer, if it's connected.
Remove the battery (to remove the battery - click here: MacBook or MacBook Pro).
Press and hold the power button for 5 seconds.
Release the power button.
Reconnect the battery and MagSafe power adapter.
Press the power button to turn on the computer.

Resetting the SMC on portables with a battery you should not remove on your own

Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.

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