[Phlogiston]

It is very common for these switches to be intermittent on one or both sides - even when they do "click". An original part used as a replacement has a good chance of going bad. I recall fighting this issue many times, I just cant remember what I did to fix it. Probably best to try to disassemble one of the switches an attempt a repair.

One side of the switch activates the display bulbs, the other side turns on the magnetic tuning feature.