Ultimate Boot CD

The current CD drive was working in the very recent past. I did try another drive and cable with no change. I was also thinking of temporarily trying the floppy from my working computer, but I haven't tried this yet. There could be a problem with the motherboard, but I don't know if I want to go to ...

Hi: I am trying to resurrect an old (1996) Gateway in order to donate it to some group that can use it. However, I am stuck with the "Invalid system disk" message no matter what I try to boot with. This includes UBCD, Boot Disk, WXp, W2k pro, W98(2) and W95. So, I have tried CDROM and flop...