After a few years with zero issues I started having problems about six week ago with my tuning adapter. Sometimes the SDV channels would not always work, then they all stopped working. The tuning adapter diagnosis looked fine. So I unplugged the TA and replugged in and restarted Tivo. After that my Tivo stated that there was no tuning adapter connected. Today I went to Charter and got a different TA (but kept the same working cable card) My tivo did alert that the tuning adapter was connected but I still couldn't get the SDV channels. Then there was an error stating that the certificates did not match and to call my cable company regarding getting the firmware updated. I called Charter and they sent a signal and my tivo immediately said there was no tuning adapter connected. Charter rep really didn't know what he was doing so he scheduled a tech appointment for next week. Sometimes it says the TA is not connected, other times it says the error about firmware. Does anyone have any suggestions so I try and troubleshoot before the Charter tech comes to my house? I have a 3 year old Roamio Plus, moca hookup, Motorola Tuning adapter. I was one of the people affected by the Motorola TA update firmware fiasco when I first bought my tivo but after the updated firmware was released I never had a problem.