Totally normal. Gotta loosen them 2 screws. It's not really a switch. It's more of a tuning dial. Take the 2 screws out and carefully wiggle the dial out. Clean everything and put a little oil on all of it. You'll see a little coil spring. It'll fit into the notches on the PV and on the dial. Replace the dial with the spring properly located in the notches. Put the plate back on, and the twoscrews. Don't tighten the screws down. Turn the dial counterclockwise 360'. Tighten the 2 screws. Then get a manual!! Ghats word for word out of the book. :-)