Mac screen is black: iMac disconnect from the power supply
If the screen stays on when your iMac is black and nothing by a long Press of the power button happens, then you can return to the System Management Controller laws:
- Disconnect the power cable from your iMac and wait at least 15 seconds.
- Plug it back in and again wait for a few seconds before you turn it on.
Reset NVRAM + PRAM
If your Mac screen is black, try the Problem with resetting the NVRAM and PRAM reset to solve.
- The NVRAM reset, by switching off your Mac, and then after Switching it on again directly, the keys Command + Alt + P + R at the same time press. Press and hold the keys until you have heard the startup chime.
Black screen: NVRAM reset
Tip on a black screen: Using the System DVD start
In order to check whether there is a Software error, restart your Mac with the help of the System-DVD.
- Insert your System DVD and press the Start button C. Select in the menu the hardware test.
- Alternatively, you can Press the D key while Starting directly into the hardware test.
In order for your data in such a case, nevertheless, sure, we'll show you the 3 best tips for Backup with the Mac Time Machine.
