Why won't my 3DS 2015 power on after reassembly?
I replaced the joystick on my 3DS 2015. After reassembly my device won't power on. What should I do to resolve this problem?
Nintendo’s first major revision of the 3DS released to Japan in October of 2014 and to North America in September of 2015. The 2015 3DS introduces improved 3D capabilities, a C-Stick, and a new set of trigger buttons.
A common mistake when reassembling the 3DS is forgetting to connect the power button ribbon cable when reassembling. Ensure that the ribbon cable, which goes from the power button in the bottom right of the device to a connector in the middle of the logic board, is connected. If this doesn’t solve the problem consult the Nintendo 3DS 2015 Troubleshooting page for more help with the 3DS 2015 not turning on.