Found a good source on why you get 120Hz buzz if your capacitors are going.
http://www.kennethkuhn.com/students/ee351/power_supplies_filter_capacitor.pdf
Might be valuable for others facing the same issue.
http://www.kennethkuhn.com/students/ee351/power_supplies_filter_capacitor.pdf
Might be valuable for others facing the same issue.