I give up on my 3ds, when trying to repair it more components got broken than before.

The power adapter didnt worked, so when exchanging it the replacement broke into half when I put the cover on it. Then when lifting up the cover the conection from curcuit board to sholder button ripped. And then when exchaning the next power adapter and shoulder button. Well both got destroyed, the adapter broke into two parts, and the wire of the button ripped.