Okay so for a couple of months now my TV hasen't been picking up any good signal for the freeview and it's been unwatchable. I took my 360 home over christmas and when I came back I switched the TV on and it had perfect signal and I was very happy....i then plug the 360 in and use it for 30 minutes or so and then decide to switch to TV and the signal has gone again.

I took the xbox HDMI cable out and turned the TV on and off and the signal is now fine again.....

Anyone know why this happens and how it can be resolved?

I tried looking on a couple of techy forums, but couldn't find much.