brucecampbell Posted May 29, 2015 Share Posted May 29, 2015 Looking for some advice please I am running an old Denon receiver to A and B speakers. (I think its AVR 1700)Every now and then there is a loud hum over the speakers.The hum comes over both A and B speakersThe hum disappears when on muteThe hum drowns out the music, however you can still hear music.usually power cycle fixes the issue.sometimes stand by cycle fixes the issue. What is the likely fault? Link to comment Share on other sites More sharing options...
wingzz Posted May 29, 2015 Share Posted May 29, 2015 Ground loop or other grounding issues Possibly Link to comment Share on other sites More sharing options...
lippavisual Posted May 29, 2015 Share Posted May 29, 2015 Ground loop or other grounding issues Possibly Yup. Possibly power supply going on that unit. Link to comment Share on other sites More sharing options...
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