I experienced this exact same issue on my Pioneer 4100NEX. When I was on the Bluetooth source, and activated the dimmer setting either through the Dimmer Settings Menu or the Picture Adjustment Menu, I would experience a very high pitched noise coming through the speakers. It was annoying enough that I could hear it over the music while driving at night.
I contacted Pioneer Technical Support and the technician was able to reproduce the issue on his 4100NEX as well. After a couple of weeks of troubleshooting on their end, they admitted it was an issue with the 4100NEX and sent me out a 4200NEX to replace it. The 4200NEX does not have the same issue and I have since sent back my 4100NEX.
If you experience this issue with your deck, I suggest calling Technical Support and mentioning that others have reported this same issue and new hardware was needed.
High pitch noise from 8000NEX display?
in NEX Series
Posted
I experienced this exact same issue on my Pioneer 4100NEX. When I was on the Bluetooth source, and activated the dimmer setting either through the Dimmer Settings Menu or the Picture Adjustment Menu, I would experience a very high pitched noise coming through the speakers. It was annoying enough that I could hear it over the music while driving at night.
I contacted Pioneer Technical Support and the technician was able to reproduce the issue on his 4100NEX as well. After a couple of weeks of troubleshooting on their end, they admitted it was an issue with the 4100NEX and sent me out a 4200NEX to replace it. The 4200NEX does not have the same issue and I have since sent back my 4100NEX.
If you experience this issue with your deck, I suggest calling Technical Support and mentioning that others have reported this same issue and new hardware was needed.
Good luck!