A4000T Replacement Floppy

[X-ray]

Are you sure the drive is dead? What I mean is, does the access light not come on at all, or does it light but not read any discs?
What have you tried to make sure it is dead?
And do you have another Amiga?

[X-ray]

Yes, you can use your A500 drive in the A4000T. Do it like this:

1) Disconnect the floppy drive cable from the small PCB that is attached to the disks module. Remove that small PCB.
2) Plug the floppy cable directly to the header where the PCB was plugged previously.
3) Replace the A4000T drive with the A500 drive.

I can vouch that this works, because I recently did quite a few experiments with floppy drives and my A4000T and PC.

[X-ray]

@ Dr Righteous

I have tried several standard PC floppy drives in my A4KT with the adapter PCB and none of them worked. I also tried the A4KT floppy in my PC and it didn't work. My guess is that there is something different about these drives: not standard Amiga floppies and not standard PC floppies. Kind of the worst of both worlds.