How to Fix Stuck Piano Keys？

Step 1: Find the keyboard with the problem, check the screw at the bottom of it, loosen this screw and then screw it back in, do not tighten it too much.

Step 2: If the problem still can't be solved, find the screw on the back of the piano and loosen it, then you can see the internal structure of the piano, unscrew this row of screws; lift the keyboard by hands for a few times.

Step 3: Check the keyboard with the problem, if the problem has been solved, put the cover back on.