Well I think the IIs memory cap is kicking in or something. I put the modules back in the same order as they were in the IIx. But I started with the four less populated boards. I got 4MB total. So guessing those are 1MB boards.

But when I installed the additional boards, I ended up with 8MB total. So they also registered as 1MB boards even though they are fully populated.

There are some blue jumpers. Only the first board had two. I removed one, same thing. But either these jumpers have something to do with it or the Mac II with its 20MB limit is just not seeing them right. But this should be 20MB of RAM in the first place.

If I boot with only the fully populated ones, I get a grey screen then the video goes out.