The HDMI port is the best option. Did you enable the second display in the Catalyst Control Center? The 5770 is capable of outputting VGA and HDMI at the same time. It sounds like you just haven't enabled the second display.
Yes it was, i had the HDMI cable in the 2nd slot, and i was on the HDMI2 channel, when the computer was starting up the TV was changing from 720p to 1080p, so im guessing it noticed the pc, just it still wasnt showing anything
I just tried a few, same thing happens. CCC can control the tv, change resolution, hz, but there is just no picture to go with it, i've had this problem for a few days now, not sure what else i can do really, I'll have to try out another TV tomorrow, if that doesnt work then it could be the PC