With one CD the machine failed to boot, possibly because of the kind of incompatibilities Aitch mentioned. I tried a different CD and succeeded. Even when it failed to complete booting, I got a message from ISOlinux, which came off the CD. If you get anything off the CD, it tells us something.
At this point you are simply trying to get it to boot anything that will run stand-alone. If you have a Puppy disk handy, that would be fine.
Added: If you still get no signs of life when you attempt to boot off CD, it might well be a good idea to swap out the one in there for an older one that worked in the past. At this point, we don't need much except the ability to read CDs written on another machine. Make sure the jumpers on the back match those on the one you take out.
No problem, Aitch.
