Screen speckled red all over then turned black screen, how to fix?

Whilst playing for 30 minutes the screen started speckling red dots all over the image. Then to the point the image was majority red. Then cutting the image off to black screen and turning the console off.

The consol3 won't show up with an image on the screen but turns on and the controller still takes action in the background.

Tried new cable nothing.

Turned off the power and left for 1hr. Tried the device again. And still failed to work. Any ideas whats going on and is this an insurance job or an easy fix what?