Powers on but dark blank screens

Bought a 3DS a year back on eBay. Never tested it out until this week. It powers on, but screens are black. Tried all the boot up shortcuts to no avail. The screens do work as I managed to update it.

Did this possibly have CFW? Is this motherboard dead. I did open it up, took it apart and then reconnected everything but still doesn't work. Please help. Thank you.

Edit. It was CFW. Put SD card in Laptop, has a folder called Luma.