Hi,
do you mean there is no movements at all?
You put the floppy and NOTHING happens... in this case I think the electronic part is dead... :-(
I had some problems in the past but the floppy was seen by the drive in some ways but giving errors... I solved the problem cleaning everything.
Try to "hear" if there is no mechanical parts broken...
If nothing can be done, could you be interested in selling me the dead guy?
Ciao