My apple mac's screen is black, when i try to turn it back on then off again it flashs with a white screen then goes back to black. It's as if it thinks when the screen is open it is closed and when it's closed it's open, can anyone help me!!!

When i open my laptop the screen just stays black, i have tried turning it on an back on and it will turn on to the loading white screen and then turn back to black. i have tried calling apple but there tech support is closed on a sunday here in australia. If anyone knows anything i can do please let me know!!!

Try Resetting your Mac's PRAM and NVRAM
If that doesn't help, try Resetting the System Management Controller
--  Those links are currently down for maintenance but should available shortly.

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