I'm not sure how much interest this will be to folks, but I thought I'd share anyway.
I fired up my YCM-40 (1993 model) for the first time today only to witness the computer die after the second cycle. How's that for a (nuts)
I did see the computer do a post before the power supply gave out however - a speedy 386 with 4MB of RAM and a 240MB hard disk WOOT! Most definitely original...
Luckily for me I was able to find a replacement machine in short order - a Pentium II 400MHz. Just an FYI - the speed means little with this vintage. A 486 or Pentium machine will do just fine. What you need is a computer that has an 16 bit ISA slot.
I'll post some pics in the next day or two so you have a reference to go by.
Mark