I just Beseler 23C II and it came with a colour head and a stabilised power supply. I just unpacked the power supply, some good news is it looks very well maintained but closer inspection the power and lamp switch are out of their sockets. Taking it apart and putting it back I found that the power switch, the black one is stuck. My questions are :
Is there a place to get replacement power switches?
You might be able to find the real McCoy -- the part # should be in your manual -- but barring that, you can easily find a suitable ON/OFF switch of approximately the same size that will fit at an electronic supply "shop". A little filing/gluing might be needed.