When i first connected my PC to the TV the HDMI worked, i had problems with the image, but i uinstalled the graphics driver and it worked. Then i restarted the PC and the TV showed HDMI with no signal. Then i used my VGA cable, reinstalled the driver and it didn't repair it. I don't know if this was the exact order of things, but something like this. Graphics card is HD 7770, tv is a philips full hd 22". TLDR: HDMI worked first time, then it stopped working and now it doesn't even recognize it in Catalyst Control Center.