I have a 2018 macmini, and it runs great apart from one thing. After having used the computer, sometimes for several hours, and sometimes just a few minutes, my external display (a BenQ EW3270U) goes black for about 5 seconds, then goes back on. All is then normal for a few minutes, and then the 5 second blackout happens again. This goes on until I do something about it. Sometimes unplugging and replugging the display cable solves it for a while. Sometimes a reboot is needed. But the problem always returns. This is with regular use, just using the web and emailing for example.
I also tried the NVRAM and PRAM resets, but the problem persists.
Does anyone recognize this problem, and/or know a solution for it?
Is it likely that using an eGPU (which I might want to do also for other reasons) would solve this?