Have this Panasonic AV Control Receiver model SA-HE100, 20+ years old, its part of our home theater system. When I turned the system ON the receiver says "Overload Turn the System OFF" and there is no sound. Checking the users guide it said to check the speakers wiring but found nothing wrong with the wiring or speakers. It also has a tiny message saying "Low imp speakers". Disconnecting all speakers wiring from the receiver that message is still there so I guess its related to the receiver. I also removed the cover and the unit inside is spotless clean despite it was never opened.
I'm not into electronics but before I scrap the unit I wonder if there is something simple I can do to save it.
Many thanks.