Try the steps in this YouTube video to set up your tv while connected to KeyTV
https://youtu.be/8wc70yT5Ne4?si=ncXj4T-hZfgfKCEY
Basically for over the air make sure your tv is connected to the cable/ant connector not the Satellite connector behind the tv.
Make sure the blue light is on in the outside connection box with no cables attached to it for over the air
Do a channel scan on your tv and make sure you search for antenna or over the ai stations not cable. This will need to be done in every new location.
If this doesn’t fix it make sure you are in an area that has tv reception. Check with a neighbor to make sure they are getting reception.
Good luck!