If you are still under a contract you do not have to re new it but I would recomend that if their is cabling in the house I would rip it out !!!!! If not when something does happend you will not have that dought that the coax was old to start with.
the dish seperator could also be the isue try connecting coax from antena directly to input one and run the ch sw if input one comes up ok ok then you go down to radeo shack and pickup a new one re run the check switch
