For some reason, my GPU has completely stopped outputting HDMI it seems. It detects that a monitor is there and makes the effort to try and display things, but the monitor doesn't actually receive anything. Could it be my mini hdmi to hdmi converter? I noticed that when I screwed around with that by bending the cord I got the screen to say "check signal cable" instead of "no signal" for a little bit (It displays no signal when it detects that the computer is there, then says check signal cable if the is disconnected). I have also gotten it to nearly display for a bit when jiggling the cable. I have a GTX 560, by the way.