I'm going through a similar issue. check that you are getting 12v between the center wire and the outer at the antenna end of the cable when the green light is lit on the booster. if that's good, then you have a good cable run from the booster to the antenna. if not, then check the output of the booster where it connects to the antenna wire for 12v. if you do not have 12v, then the boosters it toast.. if you have 12v at the booster and not at the antenna, then you have a bad cable run between the booster and the antenna. if that all checks out, then you need to check the cable for continuity between the tv and the booster (disconnect it and short the center pin and outer together with a jumper of some sort and test for continuity at the other end to verify the cable is OK. if that all checks out, then either your antenna is shot or the tv is shot/misconfigured.
in my case, I get 12v at the booster, but not the antenna end, so I'll be pulling a new coax cable from the antenna to the booster.
I purchased a Jack antenna to replace the batwing, but haven't had a change to use it yet since my wire is shot. that's Saturday's project along with washing the roof and putting a coat of UV protectant.
'01 F-250 PSD CC 4x4 SB
'08 Wildwood LE 26TBSS
State's we've RVed in