I was wondering if any others have had the problem of their spindle motor suddenly not being able to vary in speed. All of the wires are connected and in their correct places as far as I can tell and the potentiometer is working, in fact the voltage is even varied on the P2 connection but there is not variance in speed. The only other possibility I can think of is a problem with the actual controller, but I don't know how or what could be wrong. Any insight into what is wrong or how to fix it would be appreciated.

BTW, there are two led's on the control board and if I remember right they used to both light up when the spindle motor was running correctly but now only the left one will light up under any circumstances.