Samsung TV turning off and on repeatedly

It is a “50" Class Crystal UHD TU7000 (2020)”. Hardly ever used.

Sudden onset issue. TV Turns on, is normal but laggy for few minutes, then image quality drops, grays out and freezes. And repeatedly turns on and off until I unplug it. Not responsive to remote.

If I leave it unplugged for a few hours and try again it works for maybe up to a minute normally before the gray screen of death and repeated turning off and on.

I tried replacing remote batteries, changing plug, unplugging. Nothing works.

I’d appreciate any advice. Thanks :)

What could be the problem?