Apparently nothing... its was working fine but some days later the BIOS error returned then it wouldn't even post after that.
I'm ditching the motherboard now there's nothing I can do. I've got another Micro Star 6787 motherboard "I had two of these boards that seem to be pretty good for retro builds" that will fit in the IBM 300GL case with a bit of modifying to the back of the IBM case so I'll be doing a rebuild today and I'll upload some pics of the new reformed IBM 300GL once its all done.
