Computer will not start after bad weather.

I recently built a computer out old parts from other computers for my brother. Some bad weather came through yesterday and I did not home in time to make sure that everything was shutdown properly. My brother was home and I told him to shut it down immediately and he told me that before the computer was completely shutdown there was some bad lightning and then the power went out.

Any ideas on what might be the problem? My assumption is that it is the power supply. The computer does not get any power no matter what I try.

Thanks