TV constantly going out

Our main box is constantly going out. We have replaced cables with no results. This happens frequently, several times a week. There is no error message, just gets stuck on the welcome screen. Unplugging the box does not work.  We have to do a full System refresh each time, which works only 80% of the time. Outage can last hours. This is our second box (model - AX014ANM), the first one had issues with recordings.

Honestly, thinking of going back to DirectTV. 

Anyone have a possible solution?