Simm memory must be installed in pairs.

Yes - thats right (pictures were only taken for demonstration.)

I made some progress, but the machine is causing lots of problems. I finally got the onboard vga working. I found the jumper and it was in the right position, but corroded. However, graphic output only works ocasionally correct. Often its just garbeled blocks and symbols. Something seems wrong with the graphic chip or memory.

In addition the floppy drive is broken . I found a ripped off disc closing slider stuck inside the drive and it has damaged the heads. The problem now is the custom drive design and eject button. I really like the design language of this machine but right now Ihave no idea how to bring it back to its original glory... 🙁