In all the posts above I may have missed it, but were the house batteries tested? I chased gremlins with the big foot and a roof mount king satt dish (12volt) after year 3. Kept losing satt programing for directtv and the big foot was generating the simular weird habit noted above. Went to Costco and picked up two new house batts and all is now well for over six months. I went to move one of the old batts to the trolling motor on the boat and had problems, the local auto parts store tested both batts and found one with a bad cell. Also note that on some models (like mine) the bigfoot control box and connector is under the driver seat and may need to be re-plugged in. I have on occasion found it bumped loose. Bottom line if the jacks are up on the prep flight go and enjoy, hope you get it de bugged....
Hoglou the DH & BK the DW (retired and happy)
WestGA KM4HQQ 146.640mhz
L'IL Foot" 2014 Sunseeker 2300
"Harry" the JK toad in the mirror
Check out the "mods" in the albums