I've been doing minor repairs on my RCA 4 speed suitcase record player, and have noticed a loud buzzing sound from my motor. It's been cleaned and lubricated multiple times, and I replaced the motor mounts for good measure, all of which did nothing to resolve this noise. Does anyone have any suggestions for what might be causing it? Bad bearings, maybe?
https://youtu.be/Sam2PYtG7uI