I flashed an SD card with Mr. Fusion and booted it up in the extra MiSTer I built.
It looks like the HDMI out does not work. I get a black screen. I just use a cable connected directly to the monitor. This cable works totally fine with my other MiSTer.
I let it set a while so that it installed the software. I tried setting the video mode and dvi mode in the mister.ini and I still get a black screen.
So, any ideas?
I could try taking off the IO board.