For all you noobs heres how you can fix dead/stuck pixels.
1. Grab some aluminum foil that is about 5 inches long, and wrap the psp in it.
2. Now set it outside one a grill or somewhere the sun will be shinning for an hour.
3. If step two has failed to fix your psp then this one will, take your psp still warped in the aluminum foil and put it into your microwave set it on the highest power setting you have and put it in for 26.5 secs after if should look like brand new
please make sure all credit goes to me