Do you only have a tv in the bedroom or are you trying to feed another tv from there?
If you have a cable box, that has to feed directly to whatever tv you are trying to get cable channels on. Depending on the box, it either feeds the channels via coax and the tv does a search or the cable box connects via a HDMI cable and you use a remote specifically for the cable box and change channels with it.
Hard to tell what is going on without more information.
Is your outside connection labeled anything?
Some are cable only some also have another for satellite.
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