- I’ve plugged the motherboard into another monitor using both VGA and DVI-D and it works.
- I’ve plugged the monitor into another computer using DVI-D and it works.
- I’ve used the same DVI-D cable that worked with the motherboard & monitor.
Motherboard is out of the case, it has RAM and CPU and CPU Cooler. When I remove all the RAM, it gives a POST code. When I put it back it starts up fine with no complaining.
When I plug the monitor into the motherboard and turn the motherboard on, the motherboard powers up, the monitor turns grey with a blue LED but it never shows the BIOS screen.
Edit: While I'm not certain it's a resolution issue, that makes the most sense. A HDMI -> DVI-D cable didn't work, three different DVI-D cables didn't work, the motherboard worked fine on another, very similar monitor (but not the exact same model). I was able to swap the two monitors we have and both computers (new and old) are happy with the exchanged monitors, so that's the plan now. Awarding the bounty to the first person who hunted down the resolution issue.