tv about one year old. never abused. left the room for ten minutes and returned to a tv with sound but no picture (black screen). changed cables, changed inputs, unplugged unit, etc, etc. when i used other inputs the input sucessfully changed with the remote as the audio matched the input i selected, i.e., cable tv, dvd, etc. i checked the fuses on the boards in back and all are good. no repair facilities within 150 miles. any ideas????