other inputs work. why? On the ant/hrc/irc/satv (same) input all I get is a black screen. Plugging in anything doesnt work. I used to watch regular cable via coaxial on hrc. Im not sure what hrc or irc is but Im guessing it means high res channel. If I click on pip the secondary picture appears with static or a channel etc. I click swap and the big pic goes black screen and the little pic remains on a channel. Comp 1 and 2 work fine as does video 1 2 and 3. Anyone?