I have a Dell Vostro 1500 laptop and my problem is that the LCD screen blacks out when I put the power supply in. It works fine when on battery, but not when the power cord is inserted. Is this a inverter problem or is this a power supply problem? I can also mention that when the power supply is attached and the screen is black, I can get a 3/10 of a second glimpse of picture when I close the lid and open it up again. Very bizarre problem. Do you guys have any tips for me?