Are you using an HDMI 2.0 (or better) cable?
I can't tell if you mean me or the other guy? I don't know the answer. It was still in the wrapper. The rest of the thread is confusing because most of the answers are to the other poster, I think. Here is a copy of my info.
POSTED ON MACFORUMS 1-2-23
Not sure what thread to put this on.
I have a Mac Mini M1. In the past week or two, my screen has started flashing 3 different times. I have to turn off the computer and restart. I have a DELL SE2719HR Display. I did a virus scan and did EtreCheck, but nothing showed up.
REPLY – 1-2-23
What happens after the 3 flashes? Does the monitor go off or continue to operate? (Answered below)
Me AGAIN – 1-7-23
Well, I got a new mouse, changed HDMI cord and everything was fine for awhile. The flashing screen is back. When I said in the first post that it happened 3 times, I didn't mean that it flashed 3 times, I meant this has happened 3 times. Now it is happening again. It flashes really fast and the computer freezes. The cursor moves, but when I click on anything, nothing happens. I have to restart the computer.
I have a video of the flashing screen, but can't figure out how to upload it.
1-26-23
It hasn't happened since the last post. So I guess I have to wait until it happens again.