Two things here, you CAN go back to TE3 with the Bolt. New Bolt - downgrade to HD interface? But, you do wipe out everything, but I'm pretty certain it retains the cableCARD settings.Spent the day trying the suggestions in this thread without success.
Got Tivo to reactivate my other Bolt. Tried to ask for a discount with no luck. It has taken me most of the day to get it set up properly. It was on TE4 so I had to update the TE3 mini's and won't be able to go back.
The one with the issues (with lifetime) is on it way to Weaknees for diagnosis and possible repair. It will probably be worth it.
So strange that the newer Edge OTA is only available with two tuners and won't work with Minis.
I looked into Tablo and Amazon for a newer DVR solution but not really wanting to give up my TiVO's quite yet.
Also, even though TiVo says that the mini requires 4 tuners, there are many reports of the 2 tuner Edge working with the minis.