ATTENTION: All Postings that advertise items for sale will be deleted from the Discussion Forum. You may post sale items for free in the Classifieds section. Sign up now.
Re: loud hum noise near in control center by Kenneth Harp
It sounds to me that it would be coming from your power converter.
Either you have alot of 12 volt items running while your plugged into the 110 volt outlet or your backup batteries are weak and is in a charge mode.