I was deselecting digital channels with no content in the channel summary and deselected an instance of channel 0. Thereafter the digital tuner simply stopped working. I have run diagnostics, removed power cord, & reset digital tuner by pressing vol & chan on side of TV for 5 sec. Also tried another channel scan, but after scanning analog channels the screen goes blank. Any time you attempt to access the digital tuner the tv hangs for ~25 seconds, not accepting any input. Is this tuner hosed or is there some way to restart it perhaps setting the entire set back to factory defaults?