OK I followed the steps to the "T" and got the blue screen and it restarted itself and went to the update xyz and ran it and after that it restarted itself but when I go int system information it says I am runn 2.71 HEN-D. Below is what I didn't see and wondering what to do here on this as I can't upgrade to official firmware either. I have reformatted and restored to system defaults as well and still nothing.
-2.71 PSP ( not the one that is for either mobo )
If everything goes well then it will display something like this Doing preparationsandExtracting special PRXs.
4. After the screen will change to magenta or pink text Press X
-The downgrade will show a percentage bar.
5. When it finishes it will say to press X and the PSP will restart itself.
6. Welcome to 1.5