We have a problem with the cable from attena, with tv hook up direct from booster we get 80 some channels but with the one hook to the tv,s we only get 30 some. We are looking to find where splitters are located.
I found mine behind the booster switch plate as well.
My OTA and park cable reception had seriously deteriorated over the years, so I opted to replace all connections and splitters. I purchased a compression tool from Amazon which made the job easy.
This cured my problems and now reception is excellent. I guess the connections either loosen or get brittle over time.