3DS Crash after inserting headphones

[Lorenxo]

Good evening, I disassembled my N3DS to clean a key, when I reassembled it I found no sound from the speakers (except the sound of the camera). Furthermore, 3DSident detects connected headphones even if they are not. If I try to connect the headphones, the N3DS freezes and if I remove the headphones I get an error (arm11 core 1). I have already done several tests:

1- CTRTransfer
2- original nand restore
3- connect and disconnect the headphones
4- disassembled again and cleaned the contacts

If anyone had a solution I would be very grateful.
Thank you