Question Scratched backside of my motherboard

Oct 28, 2022
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Hi, I was in the process of switching to a water cooler on the cpu. had to. therefore change the attachment to the cooler. the old attachment was well attached at the back of the motherboard and therefore used a screwdriver (doomed) but then makes 4 notches. in the notches I can see copper, I can see through with a multimeter if I measure there.
Now when I turn on the PC nothing happens. absolutely again. no fans run or lights come on.
any tips to fix this?
thanks for reply!