Blank Screen when turning on laptop
My dad has a Dell Latitude D620. He complained his touchpad button was sticking. I took his laptop apart pulled the monitor/ keyboard, hard drive and battery just to get to his touchpad. I removed whatever was causing the problem. I connected everything properly and put all hardware together. I turned on the computer and it turns on but now the screen is blank. I have no clue of whats going on. I'm very frustrated, please help!