Unfortunately, I don't have any spare I/O boards (I presume you mean the main I/O daughter card - not a parallel card for the expansion slots).

The video out problem might just be the simple lack of the I/O card. I'll need to dust off one of mine to check.

I restored one for the Melbourne museum a little while back - only to have the power supply blow during the official opening!

Good luck getting you beast back up and running.

Regards,

Macdownunder