We have purchased a tan 301 from E-bay. It came with the original foot control as it is also tan. When plugged in the foot control will allow you to turn on the light but it will not run the machine. The wiring appears to be in good condition. Will we have to buy new foot control or is there some repair we can make. The machine runs great with the cord from another 301 we have so we know it is not the machine.