My LCD screen on my laptop is broken. When I power it up, all I see is the white of the backlight. It broke when it was dropped. At first, the screen would flicker on and off, and sometimes half the screen worked and the other half was simply white. This makes me believe there's a loose connection somewhere. I've taken it apart to try to fix it, but I've not been able to. Is there anything I'm overlooking or should check? I really don't want to send it to a repair shop, my warranty is expired.