Chosen Solution
I’ve gotten a magic keyboard (A1644) from my nephew. After years of abuse the spacebar and arrow down and backspace stopped working. I don’t know if liquid was ever spilled on it - but it isn’t sticky at least. I have removed the spacebar for good measure and just pressing down on the soft round with my finger does nothing. Is there any other types of tests I can do to make sure it’s broken beyond repair?
The rubber cup has a conductive area on the other side which shorts across the two contacts (switch) If its not working that’s likely the end of the keyboard.
