My 3DS top screen goes dark, bad flex cable maybe?
I've had my 3DS for a few months now, recently the top screen starts going dark, I can usually wiggle it to get it back, its like the backlight goes out or something. I don't know if it the device has been dropped, my 3 year old plays with the device quite often so it is possible. Other than that the device works fine. When I started googling similar problems I found some people talking about the flex cable, I guess it can go bad from just opening and closing the screen on certain models. Anyone encountered this problem or any clue on how I can fix it. My son ripped the serial number sticker off the back of the device so I can't send it back to Nintendo to get fixed. If its something I can fix myself I'd like to that anyway.
Jimmy Mullins, hope I understood your question right. If you want to change the top LCD just follow this guide. I bet that one of the ribbon cables has either come loose in the connector, you might try to reseat all of them, or they have broken from chronic bending. The LCD is available at places like this