A button/key was stuck on the accordion.
- the cover was removed (held by 2 screws);
- the shaft was pulled to the right to release the first button;
- the first button was taken out;
- the spring holder shaft was removed;
- the broken spring was replaced with a safety pin;
- the spring holder shaft was re-inserted;
- cleaning
- the button was reintroduced;
- the button holder shaft was pushed to the left (check shaft/hole alignment!)
- all keys were verified (adjustments if needed)
- the cover was mounted back;

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Music:
Ambiment - The Ambient by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/...)
Source: http://incompetech.com/music/royalty-...
Artist: http://incompetech.com/