If you can send me a picture of the circuit board close up and detailed I can probably rebuild it for you. Its just a speed control and reverse board if I’m not mistaken. I’ll let you know more after looking at the pic. Take it with as much detail as the camera your using allows.
Thanks Bob Lawrence Alivetodaysofar@gmail.com
i’ve had a couple different machines have boards go bad. i bought off ebay a boxy cream white unit made in china that has worked very good and has a termanal strip on back to wire into they run from $16-$25 and i removed the internals and place in place of old unitboard. if that might do it for you email me and i’ll email you the listing numbers to look at. firstname.lastname@example.org