Issues with my build

Hardware Build a PC
#1

Specs: AMD FX-6100, Gigabayte 990FX-UD3 MOBO, HD7850 gfx card, corsair cx750W modular PSU

So I've had my build since November of last year and everything has been alright. Well yesterday there was a storm front coming through and my power went out mid game. This morning i found out that my PSU(corsair cx 600w 80Plus) blew a capacitor. I replaced the PSU with a new(corsair 750Wm 80Plus) one today and the PC powers on but the screen just flickers from black to blue. Please help

http://www.dailymotion.com/video/x14zuz6_gaming-pc-acting-odd_videogames

I posted this on reddit and a guy tried to help me but i guess he got stuck :/

#2

Can you boot into the BIOS?

#3

If you have another graphics card swap it out and see if it does the same thing and that will tell you if it's the graphics card.