1, affected by magnetic objects

       Devices with magnets placed underneath the Macbook or placed in the palmrest may cause the notebook to go into sleep mode and produce a black screen.

Solution: Check whether the notebook is on a magnetic object and whether there is a magnetic device in the palm rest area.

       2, hardware settings

       Macbook hardware parameters are changed, there will be black screen problem.

       Solution: Reset the hardware settings. The method of operation is to close the Mac first, find the four keys on the keyboard: Command, Option, P, and R keys (required to use these keys later), restart the computer, hold down the Command when the Macbook appears gray screen -Option-PR these four buttons, hold for a while, until you hear the notebook boot sound and then release; behind the need to reset the system management controller, the operation step is: close the notebook again, after pressing the four at the same time Press the key: Shift-Control-Option and the power button, then release them at the same time, and finally restart the computer to detect if there is a black screen.

       3, laptop screen or video card is damaged

       If the above two methods can't solve the problem of black screen, it may be that your Macbook laptop screen or video card is broken.

       Solution: Macbook laptop hardware damage can be solved in two ways, do it yourself or find professional maintenance personnel, Macbook notebook internal design is very sophisticated, do not recommend that you do it yourself to replace the hardware, it is best to find a professional maintenance staff to help solve.