A White screen of Death maybe!?
For the most part I think it maybe safe to say that the PSP may have had some type of impact while being shipped or something of that nature because I have read about things like that happening AFTER
people drop their PSP's.
If you could ge me a picture of what you are looking at on the screen I may be able to help you out a bit more if there is a way to help. Sorry I can't do much for you right now.