Wht is my appletv light blinking

If the status light keeps flashing continuously after a restart, then it may need to have its system software re-installed. How that is done, depends on the exact model.

Identify your Apple TV model - Apple Support

Restore your Apple TV - Apple Support

When mine does that, I unplug it for about 1 minute. Then plug it back in. It usually resolves the issue for me. I hope this helps.