Please Help I am

,Few days back I hooked up my ipod to computer. It was ok.Two days back when i tried to boot my computer, it refuse to start. I tried every thing but in vain. Suddenly I hooked up ipod to computer & it got bootup & work ok. As soon as i disconnect my ipod, the computer shut down itself. now I could not start my computer without hooking up with ipod. Please sussest the solution.
Thank you