Hi all, I'm having an issue when I try and connect my 2013 macbook air to my TV via HDMI and the MBA's thunderbolt port. It was happening when I had Mountain Lion, and I just upgraded to Mavericks, and it's still happening. The strange thing is that it works the first time I plug the HDMI cable, no issues, sound and picture are great. Then if my computer goes to sleep, or if I unplug the cable, and then plug it back into the TV without restarting my computer, the computer screen flickers as if it's going to port over the image to the TV, but nothing shows on the TV screen, and the TV screen still says 'no signal.' If I go into my computer's settings, it says 'no devices detected.' I've tried turning my TV on and off, and it doesn't help. If I restart my computer, it works again. It would be nice not to have to restart my computer every time I want to connect to my TV... Any ideas as to why this could be happening? Thanks for the help!