FredA
Headphoneus Supremus
- Joined
- Dec 15, 2013
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You could have a ground loop. Try connecting all audio equipement to the same power distributor if not the case already.No one has a clue? Could it be the jumper they installed to make the fixed switch to work as the variable switch to cause background noise when using speakers?
If not a ground loop, maybe it’s the jumper, don’t know. Take off the lid (insert a thin plastic blade on a edge if having problem to lift it out after removing the screws), pull out the jumper and reinstall it while ensuring it has good grip going in. Be gentle to avoid bending a contacting pin. Make sure the pins are clean, there could be glue there. Refer to the image.
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