Yesterday, the system developed a loud buzz. I tracked it down to the Laptop. When it is connected to the power supply the buzz is there, regardless of the mixer setting. It is present in the entire system. When I unplug it and run the computer on the battery, the buzz is gone.
All components are plugged in to the same house circuit, but not the same outlet.
Do I need a new power supply for the laptop, or is there something more sinister going on...
