Ok I just installed an Nvidia 6200 graphics card on my pc that previously had onboard video, i installed the drivers and everything was fine however i plugged in some headphones into an additional headphone jack on the front of my pc and sparks shot out, made a loud noise, then the screen went black and now i only hear out the left side of my speaker, of which is onboard audio so i'm wondering if i miswired something or setup the bios wrong. The rest of the computer works fine and I attempted to change the power wire going to the graphics card however i tried to plug into my tower headphone jack and it still does that however the screen doesn't turn off anymore and i'm completely stumped. Please help me, I have a custom pc with a PC Chips model M963G with XP SP2, if you need any other information please tell me i just want to get this fixed!