How to unbrick a psp?

You'll have to run "Pandora's Battery" on a normal PSP console, turning its battery into a "jigkick" on. Keep in mind that you won't be able to use it normally after this, but you can run a program in order to create an image that will help you in the unbricking process.

The image emulates an unbricker memory stick and should be installed on your memory with the aid of a PC. All you have to do afterwards is install the "jigkick" battery and the memory stick on the bricked PSP and it will come back to life, with the 1.50 firmware. See how tough it is to correct a gamer's mistake? That's what you get for modding a console nowadays... Thank God that this unbricking solution is free, as it would have been a pain to start paying for something that's not 100 percent sure to work.