Well... this sucks
I made a topic awhile ago about bricking my psp. Called Sony up and 3 phone calls later I find that I ahve to pay for it to get repaired (110$ I think)and now there is a excellent chance that it will come back with 2.1. Now this really sucks! I was depending on 2.0 to be my firmware so that I could downgrade it.
So the point to all of this is to find somebody or way to get Sony to leave my firmware alone. I read that article about that guy that just got a 2.1 back instead of a new screen so I'm a little worried they'll do the same.
With a $110 you might as well go buy a new PSP motherboard and replace your current one. If you are good with taking things apart and putting them back together, that would be your next best choice. There are also websites that shows you how to take your psp apart and here is a site where you can buy a new psp mobo: PSP Motherboard
you are out of the warranty period?