My Window 7 mini-tower was working. I wanted to erase a secondary drive I had in an XP pro computer. I connected the second drive from the xP unit as a secondary drive on the Win 7 computer. Now nothing I do works-black screen. When first pushing the start button (its a Dell GX260)
I get a burst of power, the dead for a few seconds and it tyries to boot again. I put the original dribve back in the windows 7 machine but still the same thing happens.