After watching several YouTube videos, I went back to regular cable TV and the screen was frozen with the image that was showing on the channel. The TV doesn't respond to the cable remote, however it will respond to the app buttons on the Hisense TV remote. I've unplugged it for more than an hour and plugged it back in, same thing. I did a factory reset, same thing. I'm at a loss!! Any suggestions would be appreciated! Thanks in advance!