Dr. Know It All (Harold Hagen) has been encouraging Jukeboxes to spin & sing for over 40 years. Since 1988 he has written a question & answer column for Always Jukin’ Magazine. He has answered over 2000 questions about problems which occur in 20 to 70 year old Jukeboxes. He has been thanked by satisfied Jukers all over the world. If you have a ‘Jukebox Problem’ (and if you have a Jukebox, you WILL have a Jukebox Problem) we recommend Dr. Know It All’s books as a starting point for solving the problem.