Repair of a Keyboard

Yeas it is just a toy. A far more better toy than the soldier dolls, or demolition demons so often sold as toys. This one - the keyboard - did not work, so I had a look at it.

Mesuring inside Already done
Actually a problem solved very fast: A connector had some corrosion, and it was changed with a new one. That is all what can be said about that, so let us leave it that way.

Questions ?