It can happen a lot of different ways. That is why I always tell people to post their backups on here and me or someone else will help them in making sure it is a good dump. There are many different areas in a dump that are just for your ps3 and with out these areas you can not fix a ps3. I will look real close at your dump when I get home but if technodon said that it is not there then I am sure it is not there.
Technodon has been around and knows what he is doing so I do trust him when he said it is not there. One thing you can do is get on eBay and buy another mother board that matches the one you have a then downgrade that one and use all your parts that you have to make a whole system. Thanks and sorry to hear about that.