Either way, the M1 mini is going back to the store until they resolve the problem. So it's either a software problem or a hardware problem.
DVI output using HDMI to DVI Adapter (sold separately)'.Support for one display with up to 4K resolution at 60Hz.Apple specs say 'HDMI 2.0 display video output Just plug in the M1 Mini to the monitor, connect the keyboard, mouse and. I had a mac mini late 2014 and the HDMI to DVI adapter worked fine.