Hey all! A number of people have been reporting that thier games start then switch off psp, so here is a fix for you...
1. Go to recovery menu (switch on psp while holding r trigger)then go to configuration.
2. Change 'game folder homebrew' settings to: 1.50 kernel.
3. Change 'umd mode' to: sony np9660 -no umd-
4. Change 'fake region' to: america
then go back and go to CPU speed. change the 'umd/iso ' speed to default.
I just tested this method on 5.50gen-b full and smackdown vs raw 2010 and it works perfectly.
Use this on other games that dont start. hope this helps.