Turned on TV and black screen

[Rocky3]

1st time this has occurred. all was well when turned off last night.

Was there an update overnight, don't know. Solution was to unplug power, wait and plug in to reboot.

[Nighthawk]

I've had the blank screen once. Same solution as you found worked for me, and haven't seen it since.

[newio]

I just had this happen on the 21T. Had to unplug.  This is not ideal.

[Rocky3]

This past week it has happened multiple times on same day between TV use.

This morning turned on normally. So it continues, when it happens must unplug, wait, replug power.