flash9999

I’ve had a Spider Jam for the last ten years. Great amp, but I often get a loud buzz that comes and goes on its own. Different guitars, different leads, no fx pedals. The buzz reduces when I touch the strings but does not go away. Starts and stops suddenly. I live in a country with a two pin power supply so no earth on the power cord. Also have a play button that no longer works. Any way to fix that without dismantling the amp? thanks.