As a few others have mentioned, we've bought several of this same model, assuming that the problems were isolated, but they are not.
The first TV randomly shut off - sometimes preceded by a period where it is unresponsive to the remote. It was necessary to cycle power in order to get it to start again.
The second TV arrived smashed. The manufacturer's box is not rugged enough, and Walmart does not put it in a shipping box. It arrived with a dent and a tear, and with two of the four plastic stays that hold the box together missing. The screen was badly broken.
The third one does the same thing that the first thing did. I contacted Hisense customer service. The chat was useless, so I called. I was told they needed to escalate the problem and that they would call back by last Wednesday. Today is Sunday. Crickets.
I've wasted far more time setting up, repackaging, and returning the TVs. Also, I paid for one of them with two separate forms of payment (used up a gift card and charged the rest), so Walmart won't refund my card. Instead, they insisted on putting the full amount on a gift card, which is kind of a drag.