Well, I took all my screenshots of my psp into a folder on my pc. Then I took like 5 in the lobby when I got on SFDM. Played a game like 20 minutes later and my psp turned off.
I don't think it has anything to do with the screenshots.

I'm gonna try a couple of different things. I'll download coderpr instead of nite pr.
If it still happens I'm just gonna open up my psp and clean it. Hopefully I don't break it.