Funny characters on screen?

Have a stand screen, as well as funny characters…

Then nothing works anymore (Alt + F4)

I reset my computer once and in the middle it happened again (but still loaded and then booted without signs)

I always restart the computer via the housing key

Sometimes I have no picture and my monitor has no signal

I've already changed graphics card slot and the Displayport connection

PS: I actually hate Fortnite like the plague.

Looks like a dead GPU. Or after a dying GPU

If you still have a graphics card try the times to connect and see if that happens again. If not, your video card is flipping.