Why my kmix mixer won't start?

Hello,

My kmix mixer is kmx71. On the past few months it had some starting problem. But once it started, everything was normal, speed changed, and it functioned 100% ok.

Lately it stopped starting at all, no matter how much i try to turn the dial on and off.

Motor Brushes seems ok. Nothing seems to be burnt in the control pcb.

Could it be the speed sensor? A triac? Please advice whos the blame.

Thanks,

Idan