set is set in the menu to catv or cable and not air/antenna.
Try if a search does not pick anything up to with the remote select any channel using the number buttons on the remote and make sure set is not set to a video input----in most cases with no signal you would either get snow or a blue screen.
I did not ask but where are you connected to the set and with or without a box?
Answers & Comments
Check the simple things first:
set is set in the menu to catv or cable and not air/antenna.
Try if a search does not pick anything up to with the remote select any channel using the number buttons on the remote and make sure set is not set to a video input----in most cases with no signal you would either get snow or a blue screen.
I did not ask but where are you connected to the set and with or without a box?