You can try a method where you draw on the key connections with a 6b pencil this worked on my psr 280 after cleaning it with alcohol to get some of my keys to work again even more started failing and after some research I tried that and fixed all of my keys :)
You can try a method where you draw on the key connections with a 6b pencil this worked on my psr 280 after cleaning it with alcohol to get some of my keys to work again even more started failing and after some research I tried that and fixed all of my keys :)
Why put the device together without testing first? Now you had to unscrew the device at least three times.