Sony hd projection tv model kdp-57ws655 will turn on at tv or remote control but none of the other functions work. With the cable running thru a DVR I get no picture and no sound. Running the cable directly into the tv, I get one channel but still no sound. I can't access the menu.  This sony is a piece of garbage, I just spent $400 to get it fixed,it wouldn't turn on, about 6 months ago, The set is less than 5 years old. I changed the batteries in the remote. Thanks for any help.   Bill