Break down : If you get surged and your PC doesent work 6/10 times its your Power supply. Now if your PS blew theres a chance your Mobo blew also, meaning you could have also blew your ram and everything attached to the MoBo.

You could have trashed the MoBo. Best way to test anything, Take the ram GFX sound and everything out, start the PC up if it wont start its the PS. Then individually put things back in until it won't start up.