ASUS 970 Pro Gaming AURA Weird mark on the back...

FrozenGuard

Prominent
Mar 21, 2017
1
0
510
Hello, i would like to ask if someone can explain what caused that mark on the back side of the motherboard. The motherboard worked and now it is not working. No beep sound. Nothing. Ram cpu vga are working. I tried them on a second MB.
Thanks.
Motherboard Picture