It is good to know that there is assistance in the club for problems like this.I do board-level troubleshooting, but there's no way to know if I can be of service without seeing the unit first. It's usually not possible to get a schematic diagram for units such as these, so there has to be a certain amount of skill and a great degree of luck to fix them. Having said that, anyone who has a problem with an electronic piece of equipment is welcome to contact me. One member contacted me about a problem with two speed controls. One was fixed, one was not.