I'm trying to restart an olivetti PCS 386,

It turned on initially and it worked for a few days, then during the installation of windows 95 it started giving me some worrying data for the conclusion of the installation until it stopped and it never started again.

I have installed a post card on parallel, the olivetti I want this to have some info and the card tells me that the start stops at code 46 -

which according to "bios companion" is a problem on the KBC.

I tried to replace it with at least 8 others that I had on the various cards, but the situation worsens the pc either post or it stops immediately.

I also installed the controller mounted on the olivetti on the other boards and the result was that they did not start.

So the doubt arises, is an original OLIVETTI KBC needed?
Does anyone have a way to test a similar situation or have experience in this regard?

Or maybe the problem is elsewhere