We have inspected your 3DS unit. There is damage to the speaker cabling through the hinge and the hinge needs repair and adjustment. In addition our technician noted that the buttons require cleaning and dust was found on the motherboard and screen. The dust need to be thoroughly cleaned out or you run the risk of shorting a component on the board. The total cost for replacing the integrated ribbon cabling, cleaning the unit with return shipping is $84.95. We had to completely disassemble the machine in order to complete our diagnostics. 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 $29.95 due to the full disassembly of the unit to diagnose the issue.