<html> <body> In answer to your basic question. Yes, you'll probably have to take out the action to "fix" it. How old is the piano? Young Chang (Samick) used to have a plating problem with their center pins which caused them to seize up. Damper underlevers included. If that's the case, take out the action and the underlever and repin it. That's the only real fix. But if you have one, you'll probably have a lot more as time goes on! Otherwise, it could be hanging up on the sostenuto tab or be tight in the damper guide rail bushing. My guess would be the underlever, though. Avery Todd University of Houston At 03:18 PM 5/16/2006, you wrote: <blockquote type=cite class=cite cite=""> Hi,   The damper in the G5 region of a Young Chang model GS-150 small grand piano gets stuck open if you hit the key pretty hard (it must be pushed back down by hand). A medium hit on the key seems to jam the hammer for 1 second but it returns to the down position. Even if I hit the key lightly I observed some binging of the damper before it returned to the down position.   What could be the problem, does the action have to be taken out of the piano for repair?   Thanks,   Marc</blockquote> </body> </html>