Presume you are scanning for channels on the bedroom TV and selecting "Air" for your source. IF not, try that.
The cable to your bedroom TV comes from a splitter which is part of the preamp switchplate. If you have two TV cable jacks in your bedroom there may be a splitter behind one of them. In my trailer the cable from the preamp switchplate goes to a splitter behind the cable plate near the center of the rear wall adjacent to the nightstand (twin beds). One wire from the splitter goes to the connector on the plate, the other wire goes to the other plate in the bedroom.
If you have two TV jacks in your bedroom, pull the plates and make sure that the coax cable is connected as described above. If you only have one plate, pull it and make sure that the coax cable is connected behind the plate. Disconnect the cable and check to make sure thet the solid center conductor wire sticks out far enough to be flush with the front edge of the screw-on ring.
If all of the above is OK, TURN OFF YOUR
12V power with your battery disconnect switch and verify that it is off by turning on a light in the trailer. Once you have done that you can pull the ANTENNA/CABLE switch plate without blowing a fuse (don't ask how I know). Check the cables on the preamp board one at a time being careful to put them back in the same place. One goes to the antenna, one goes to the cable connector on the outside of the trailer (probably through a jumper plate somewhere) and the other goes to the back.
Here is the spec sheet for a switchplate that has the preamp control and the satellite jumper all together. Ignore the part about the outside TV.
https://www.google.com/url?sa=t&rct=...j1BIl4EAf5ZzGQ
Here is the spec sheet for a plate like the one in my trailer. Ignore the part about the outside TV.
https://www.google.com/url?sa=t&rct=...51I4q0OxfqUKiw
When I bought my Safari 25 someone had modified the wiring behind the preamp switchplate to change the outside cable input to be a link for an outside TV. The back bedroom didn't work. I had to straighten out the wiring to get cable TV at all and to get the bedroom TV to work.
Al