iMac screen goes black randomly when mouse moved right.
I have a 2019 iMac 27". Every now and again when I move the mouse the screen just goes black. Randomly but frequently, normally when I knock the mouse with my arm and it moves right, although attempts to simulate it have failed so the best i can say is "sometimes when I accidentally move the mouse the screen goes black", press "enter"on the keyboard and things come back. Interestingly, while the screen is blank, typing in the keyboard has no effect. It's exceedingly annoying when you're right in the middle of something important, like this post!!
Does anyone have any idea? I have tried googling this but I just find lots of threads about mac screens going black and waking up with a wiggle of the mouse.
This is almost identical to a post on Jul 11, 2015 12:20 PM
iMac, OS X 10.11