ATV requiring several reboots

I have ATV 3.0.1 with aTV 4.0.1 and after leaving it on for a few hours, it shuts itself off. I can’t seem to get it back on without rebooting (unplugging), attempting a couple of resets, rebooting again, or some combination of the above. I’ve been spending 20 minutes to get it back up and running each day. Since I only recently installed this unit, is this something to do with ATV 3.0 or aTV 4.0? Has anyone else experienced issues with ATV just shutting down and not restarting easily?