I just received a Yoon Sona Pachinko machine today, purchased off ebay. I purchased this particular model because I really liked the reel drums and music from videos I had seen of this machine. However, after activating the unit, I noticed that one of the six drums appears to be stuck, while the others are turning freely. The entire drum itself (the drum containing all the others) does not seem to move either. This one makes a terrible grinding noise. The clear cover over the big drum also is missing all the screws holding it in place, so it is loose. I am pretty new to these machines, having only owned an older vintage nishijin shiroi kamome pachinko. Yet I noticed from an older closed thread that this happens sometimes through shipping. So I am hoping someone can help walk me through a fix or point me the right direction. Thanks ahead for any advice.