DF1: P R O B L E M ?!?!?

[pyrre]

Have you tried stripping the amiga down to bare system, and only boot from DF1?

Most likely your external floppy port is dead...

However, install WB 3.1 to a hard drive. It is what is was meant to do. And then install IDEfix.

[pyrre]

The controller may be dead.
If i not am completely wrong, the CIAs controls the FDD.
CIAs on any amiga is easily damaged...

[pyrre]

I remember that before opening the desktop to hook the IdeFix Express tre DF1: worked fine!!!!

so:
Try without the IDEfix.
I fact, try removing all parts and boot with only the DF1 to see if it works. If it still do not work, you may have to change the motherboard.
If it works without the IDEfix, it is over my head...

[pyrre]

Is the motherboard fried ?

Hard to tell at this moment. You need to find someone who knows how to test CIAs if they operate bad...
(if the CIAs controls the floppy, that is...)