I have a Beosystem 2500 from 1992. Works flawless, except the FM Tuner has trouble to reliably tune radio stations and sound is very often distorted. There is a lot of "hiss". Is this something related to aging components and can be fixed? I have the service manual, so any idea would be helpful. I use the rabbit ear antenna and FM signal is strong in my area.
Regards
Bernd