I've got a receiver from the 70s that's been working fine until the last few weeks - it's cracking in the right front speaker, with no signal present (and it doesn't seem to be affected by volume). It ...

I've got a Sansui G2000 Receiver from my father in law last week . When I turned on only the panel lights work, all other buttons give me no responses. I've already tried to use FM, AM, Aux, Phono, ...