I've had a Rowe R-85 Jukebox for a few years now. I unplugged for a while, went to turn it on and the magazine won't turn. The mag motor is the only light that comes on. It sounds like it's getting power, but won't turn. It will freely turn manually, so it's not locked up. Also, the number 100 keeps displaying on the LCD unless you switch it to service mode, then it will display the selection entered, but won't play. Had zero issues before this...is there a way to test the motor or is that even it? Thanks...