I have a United shuffle bowler and have become familiar with most operations. My friend has an older model (1951) that has begun blowing the main fuse. It has not done this the previous 10 years that he's owned it. This only happens when the machine is turned on and then not played for 1-2 hours. After that amount of time sitting idle the fuse blows. If the machine is turned on and played right away the fuse does not blow.
I will be going to my friend's house this weekend and attempt to trouble shoot the problem. Can anyone give advice as to where I should start looking?