Temperamental spindle

[mark84]

Sorry Clive I've confused you. I meant he may need to buy a new VFD. As I understand it this is the original one the Dean installed.

I was curious, is it possible to set the spindle speed on the vfd, and start it up, at least if I could do that I could do some milling without fear of another broken end mill!?
The router has never had heavy usage, I can't reliably say total hours used, but it's likely a typical week it's in use an hour, over the past 3(??) Years.