Hello all, Noob here. I have been into A/V for years but have not had much hands on in the hd area yet. My buddy bought 40" sony lcd the other day and called me to hook it up to comcast HD box through HDMI. Did this and got nice signal but couple problems. Comcast box is outputting 1080i. 1. When changing channels the video cuts out. Sometimes it comes back, sometimes it doesnt. You have to turn the tv off then on to fix???? I heard something about going from Hd to nonHD channels???? 2. It seemed that the HDMI input on the comcst box was loose??? I was moving the box around and it woudl loose video but then if I "pushed" on the HDMI cable, it would get a picture??? Or is the HDMI cable just touchy. Any help would be great.