Did I for sure kill my motherboard?

Jul 3, 2018
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Building my computer I made at least two mistakes. First, didn't know that I needed all the standoffs. Second, I used one of a wrong screw to attach the motherboard to one of the standoffs. I immediately felt and saw that it was wrong, but couldn't get it out easily, so i left it. Then I discovered that the chassis came with three standoffs that weren't attached. Since the too big screw was already causing issues I thought it was best to just leave it. After building, perhaps not surprising to anyone here, the PC wouldn't boot. It turned on for a brief second, fan and lights on, then straight off. I went to the forums and discovered the importance of standoffs, and disassembled everything. Of course, the screw that was wrong didn't come out no matter how much I sweet talked it. In the end I used pliers to force it out, and ended up scratching the board around the hole (see image). I then carefully reassembled it, all the standoffs in place, proper screws and all that. I am still getting the exact same result, it turns on for a brief second, then off. I have followed the troubleshooting checklist, and have concluded that I probably broke the board, but don't want to order a new one and get the same problem if there is something I didn't check. Thoughts? Is it irreparably broken for sure?

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Remove all, stick it on a bench/table, plug in cpu, 1 ram stick and the power to the computer - nothing else
Then plug monitor into the back of the motherboard (assuming your computer has an iGPU) and see what happens.

The damage to the motherboard is nothing at all, and I can't see how you would blow it up without the standoffs, because as you said there are already 3, so that means you only had 3 screws in the entire board.

 
Thank you both for your answers! It turns out I made a third crucial mistake, I bought a Z370 motherboard with a i7-7700 processor, apparently those don't go together so whether or not I destroyed the motherboard, it wouldn't have worked anyway. I'm afraid we'll never know if I ruined it or not. Anyway, I'm ordering a new motherboard, one that should go with the processor, and try again.