I have an HTPC that's been in the same configuration for about a year now. Used daily to watch videos on my HDTV via a DVI-HDMI converter cable. Well today I popped out the video card to trouble-shoot another PC. Then I put it back in and now I get no output on the HDTV over HDMI. The TV is detecting the HDMI cable fine, everything is plugged in but it seems that the PC isn't outputting any signal over that port.
Is there a quick way to fix this? It seems that I need to change the resolution or something, but there's no way to do that remotely that I can see.