If you are blaming us for the alcohol and brush idea for your PC not working, you can forget that. Alcohol is about the only safe product to use for cleaning hardware. If you took a metal brush to it, that's your own fault, as we said tooth brush. There is no way an egg cooked and turned hard like that on any component, I think you took far too long to remove the egg and it has dried and soaked into the coating of the PCB, much like an egg will do to paint it you let it sit for too long.