I have seemed to come accross this issue a few times in the past but never botherd to look much into it, that is until now. I am curious as to how I can fix this now as I have run out of spare floppy drives.

Esentially, I had replaced the intermal 3.5" floppy drive in the Macintosh Plus with a previously working example. When I did that, as soon as I switched it on all it does is keep going through the eject motor cycle over and over. Anyone have any idea why it would do this?

Thanks in advance.