Just to follow up on this old thread, I've now bought a second PII, this one a Rev. 1.6, still no dice. Neither a 1.4 or 1.6 PII will work at all when Indivision output is plugged into its input port. The screen stays black until the Indivision is unplugged. Both PII's otherwise work fine.
I'm beginning to think there is a fundamental incompatibility between the output on the Indivision and the input/pass-through port on the PII.
I can't really be the only one who's ever tried this, can I?
Should I just keep throwing money at graphics cards and hope one works? Maybe I'd have better luck if I can find a PII+ or a Spectrum? Or should I just give up and buy some kind of external monitor switch, dashing my dreams of the perfect A2000? LOL.
On that note, anyone want to buy a couple Picasso II's? :p (j/k until I can get this resolved)