Why did my screen go black but has sound?

Why did my screen go black but has sound?

Screen went black can still hear sound

ANSWERS:

"If when shining a flashlight into the screen you still see things. It’s probably a backlight issue. LED’s often last a really long time. LED drivers and power supplies, not so much. The top three failure inducers are temperature, power surges, and cheap parts.

Also if the power light is blinking or odd colors the TV itself is trying to diagnose the problem for you!"

Hi,