I have to use 2 remotes with this tv, one to turn the tv on and raise and lower volume and one to turn the cable box on and change channels. Well last nite in the middle of the show they bumped and the tv went to blue screen. I assumed it was the tv remote but cannot get it back working. There aren't that many ways to set it. but I just cannot get it to work. I need help. At one point I had a picture but no sound or picture with static. I have Comcast as a cable company.. Help