Sorry for the delay, forgot I posted this here.
Yes, I checked the voltages. They are within spec and getting to the voice board.

Working on a Roland Juno-6 for some repair practice. The thing is in pretty bad shape cosmetically and just sits in my friend's practice space. It powers on, the LEDs light, but produces no sound at all when running through either of the audio out jacks. When I try the headphones jack, it produces a...