My desktop just started giving me problems. It turn on , no beep and no display on the screen with the fan running until i turn it off. So i decided to open it and took the memory out and placed them back in, didnt work. Then i started wiggling the 15 pin video connector and its started working,out of no where. But at first it started displaying the wins 7 and then went to the main screen, but onces i started moving the pc the screen changed color or the screen would turn off again with the computer on. Right now the computer is working fine like it never happen but i know it will. Please help me try to figure out which hardware is the problem