It sounds like there might be something simple that may have been overlooked. I mean DVI works which means your computer is fine. Unless you were very rough moving the computer i cant see why anything would be broken.
How many hdmi ports are at the back of the computer and is it in the right port in the graphics card? next to the DVI port.
When the computer is on, have you tried removing the HDMI cable and reinserting it?
Im hoping the problem you originally had is the same and not now a problem on top of a problem from means of troubleshooting uninstalling/reinstalling drivers etc.
LOL....wow. I had the HDMI cord plugged into the computer HDMI slot, not the graphics card one. I forgot this computer even had an HDMI slot.
Not to mention I was working on this at 4 in the morning, so I wasn't thinking clearly.
I feel like a complete idiot lmao
Thank you for your help though! I fought with this all last night, messing with settings, downgrading my graphics card driver....oh, man. Thanks again.