Quoted from silver_spinner:
Has anyone had trouble with slimer not going up or down? Won't work in test either. GB pro.
The little board the slimer motor wires go to has a green led and a red led on.
Mine wasnt working once either (though a prem) but then I noticed that one of the molex connectors on that motor control board had popped off. Although you mentioned the LED's are on, I'd check to make sure all the connections are there (and that the wire harness around it doesnt have a connector just hanging around)