WB 1.3 fails when inserting new floppy

[Oldsmobile_Mike]

Have you cleaned the drive?  Checked the disk insertion sensor?  Checked the cables?  Do you have any other disks you can try with it?  If you boot a game disk, does it load and play successfully?  Replacement drives are pretty cheap and can still be bought new AFAIK.

If it's nothing to do with the drive I almost wonder if it's bad memory... something is making me wonder that, maybe haven't had enough coffee yet today.  Have you removed any/all expansion boards and seen if that makes any difference?

[Oldsmobile_Mike]

Great!  Well, not great, because RAM cards are expensive, but glad you found the source of your problem.  You might want to look at replacing it with an accelerator that includes RAM, or if it has removable chips try to narrow down to the specific chip, or something like a Kipper2K ram expansion (i.e., new hardware instead of something 20 years old), or a hard drive controller that contains RAM expansion...  Cheers!