Update: both motors work fine; problem was the ball was not in. When I put the ball in, I discovered that the right motor would only go up about 2 inches. After further investigation, I noticed the part above the motor holding the belt was catching a small metal blade. After I repositioned the blade everything works great!
Now I just need to get the music to play. I have all other sounds and the music at the end of the game. Just won't play the music when the balls goes in the numbered hole...