Black Screen on start up

This problem happens every time that I have to reset or shut down my pc. It will show absolutely nothing but the lights on my mouse and keyboard turn on so I know it is getting power there is just no display. Whenever I hit the power button it instantly turns off as well. The weird thing is if I keep turning it on and off over and over, eventually it will turn on and show a display. It will then stay on and run perfectly until I either reset my computer or shut it down. This problem started to occur after a storm knocked my power out and since everything works some of the time I am figuring it may be a power supply problem but I wanted to get other peoples advice before buying anything without narrowing it down first.

Ram 16 GB
processor Intel Core i7-4770K cpu@ 3.5 GHz
Graphics x2 Nvidia 770
Power supply 850 watt

All help appreciated and thank you for your time.