Question TV reboots continuously with only Tv Logo

Mar 18, 2020
My Samsung TV just reboots continuously with Samsung Logo. I tested my remote and it's fine. TV switched on and off with remote so i don't suspect it's a power board issue. I check with another working main board and it still has same issue. What could be the other reasons??
TV Model :- UN55MU6290FXZA

Never again buying Samsung TV. They are so trash.