Bosch 4000 table saw

[joalmorris]

Out of the blue my table saw stopped working. When I turn it on, the blade turns backward about an inch and then stops. The motor continues to hums like it wants to run. I turn it off immediately. I've read through the advice below and most people think the speed control is the problem. Well..I bought a new speed control and replaced it. It still does exactly the same thing. Does anyone have a Plan B suggestion for me?

[Tinkerdave]

Hi Joalmorris, The fact that the motor tries to turn backward and then stops and hums leads me to believe also that your control module is bad.The control module is trying to apply the brake and this is why you have slight movement in reverse.Bosch has had problems with this module and we have even gotten them bad out of the box.Are you sure you have it wired back up right. Did this problem just suddenly appear or did you notice the saw doing other things also.As much information as you can give will greatly increase the chances that someone can pin down what wrong with it.sorry I cant be more helpful.
Tinker