If you're lucky pounding on it may work. Didn't with mine. These things are time bombs and it will fail sooner or later. I'm supposed to get a new one in about a week because mine is holding 6 CDs hostage and is totally unresponsive. No noises like it's trying to do something or anything - nothing. Apparently I'm only getting a replacement of the same type (warranty co. didn't okay the new and supposedly improved Isuzu changer), so I'll be trying to put some cash aside for a Pioneer because I know it will do the same thing before long.
Anyone want to take guesses if I'll ever get my trapped CDs back, and if yes, how many months it will be?