We have inspected your 3DS unit. There are problems with the shoulder button electronics in the system. This delicate repair requires the disassembly of the console in addition to component level repairs to the electronics on the motherboard to replace shoulder buttons which are integrated into the motherboard of the system. The total cost for replacing the parts, repair, cleaning the unit, with in store pickup is $47.95. That includes a 90 day warranty on the replacement parts and repair. As an alternative we can simply return back your unit to you and the inspection and diagnostics fee is $19.95.