PSPVault have released a PSP Parts/Repair Guide, heres the info:
Many of us have had our PSPs for over a year now. There's no doubt my PSP is beginning to show signs of age. Since most of us probably didn't bother to purchase extended warranties, this means that we could end up having to pay for repairs. And who wants to do that? I certainly don't.
Hopefully you'll never have to use the new Parts/Repair Guide that I just posted in the Guide Vault. Hopefully you'll just read through it, think "oh cool," send the link to a few friends, and be done. Or maybe you just want to put a new faceplate on your PSP because your current one has too many scratches.