TV keeps booting to home screen then screen fades out and tv reboot

Samsung UN50AU8000FXZA keeps booting to the home screen and then screen scrambles and fades to black in the top left corner then the TV reboots and does it again. I made sure software was updated and I've tried turning off the anynet+ this didn't help I've completely turned off internet same and I tried factory reset but it only stays on for maybe 5 minutes at most and that's after I unplug it for 15-30min.