Technics SA-5550 FM tuner

[nechnics]

I have Technics SA-5550, worked fine. Now everything is working (phono, am, aux) but FM tuner.
No sound when selected FM.
What could it be?

 

[kellys_eye]

What could it be?

Any number of things! First thing would be to check the switch itself (clean the contacts) but anything above and beyond these simple tasks will require some test equipment and, importantly, the schematic. Do you have or can you get them?