Holy crap! What did you do? I don't think there's a trace left. Did you use your dad's 1/2" drill? You ground on all those resistors and chips too.

Assuming your power supply is working, I would have started with the connectors and power rails.

What did the repair shop find?

Check the voltage rails. Start with 12v. Turn on power and look at board with thermal camera.

I don't think they give quotes on this forum. you need to email or text them. Did you look at the connections under magnification? Can you move the...