In order to open the PSP, we must first locate all the screws and unscrew them. There are 7 screws that you need to unscrew. Now the last screw is hidden under the warranty sticker in the battery slot. So if don't want to void your warranty, then better stop reading as you're only wasting time (Peace!)
Missing screw # 2. So don't mind the photo if it's missing a screw.