if you have scratched, cracked or dead pixels on your Sony PSP's screen you dont have to return it to Sony or the seller, just buy a new Replacement LCD Screen with Backlight from www.channelgoods.com, it's easy to repair the console yourself, the new screen comes with repair tools and detailed Instructions on how to do it yourself.

nb : there is many other sellers all over the word, search google for 'psp accessories' plus your area or country name.