My nephew dropped his laptop and destroyed the original screen. I ordered a new one and it wouldn't work after installing it. I ordered an OEM Screen thinking that was the issue, but the new screen backlight doesn't work either. I've checked the video cable (with a new one) as well, but still can't get anything. I can see the display if I shine my flashlight on the screen so I know it's just the backlight. Is there a simple way to troubleshoot what could be causing this?