Just in case anyone still has these issues I'm going to post how I found a way to resolve them. I had all the problems mentioned in the previous posts and more besides. The inability to apply OTA updates, the device would freeze after 5 seconds of inactivity, endless boot loops, failed recovery partitions etc etc etc.
This method brought my Tegra Note 7 back when it had several of the problems mentioned earlier in this thread, all at the same time.
Hope it helps someone.
My zatoc tegra couldn't do the OTA updates and i resorted to loading but somehow ended up bricking the thing. I hope someone can help. If you've downloaded the file before could you perhaps share it?
Thanks in advance.