Could still be too weak or too hot at the Tivo. If the Tivo is connected to the coax coming out of the Tuning Adapter, try splitting the coax before the TA, with one leg going to the Tivo and the other to the TA. If it's already split like that, try taking the splitter out and connecting the Tivo to the TA coax output. The former will result in as stronger signal, the latter, a weaker one.