Why did my turned off tv screen flash?

Question

Woke up and saw it flash like a camera flash, it's a Samsung. Should I be concerned?

Answer 1

Maybe it isn't really off.
It could be set to an unused input.

Actually, since any TV that is plugged in
has a few circuits that are active (so the remote can switch it on),
it is possible that a power glitch caused a momentary activation of the backlights.

In general, I would not be concerned.