I am running a somewhat old GPU (EVGA GeForce GT 640) and I was playing a game, and I accidently unplugged the HDMI port (From my TV/Monitor), and now it won't display at all to the (mini)HDMI port. I had an old VGA monitor and plugged it up to that, and that works. and I went into the settings and it won't detect the HDMI! Someone Help!!!
Im sorry to say but you may have damaged the hdmi cabble or posibly you gpu but i doubt.
-Yeti
HDMI Cables are quite flimsy, as Yeti said, you could've damaged either the HDMI cable, or the inputs on either devices. I would suggest getting another cable and trying it on another HDMI slot on your monitor.
I've tried both inputs, but i don't have another miniHDMI to HDMI cord
Did you switch channels on the monitor? Maybe you should invest in a new HDMI.