A JBL PSW-D110 Subwoofer with the complaint of a Loud Buzz/Hum with Nothing Connected Repair

A JBL RSW-D110 Subwoofer with a LOUD Humm/Buzz with nothing connected. I found one of the main filter capacitors was defective and needed re[placed. I replaced all of the main electrolytic capacitors, and small capacitors as well as some resoldering on the board, just to be safe.