ATV 2 Keeps Restarting

I need some serious help. I had to  re-Jailbreak my atv2 cuz ssh connection with Putty was showing "connection failed. After I reinstalled everything, I changed my password before updating Nito tv. While installing programs through Nito tv wehn I was installing Plex the screen went blank, Apple logo comes onscreen then goes off again and the atv box flashes. This keeps looping. I’m so pissed! Any help is greatly appreciated.