Device compatibility list - PSFreedom Wiki
Edit: @Omnomnom: I just sent a PM to sorrowuk to update the first post with all the instructions for downgrading so we can stop repeating ourselves.
Thanks, I'm on two different threads answering the same questions :P
Found it. It obviously needs some work (not hosting the files on multi-upload, etc), but it should work for newbies.
This guy over at my site said when he got his CECH-2501A PS3 it had 3.40 on it. :shrugs:
Alrighty, So, I wen't ahead and followed all the steps. After inserting the USB with the lv2 and pup files, the ps3 seems to be downgrading, nothing on screen of course. Machine turns off, I go to turn it on and nothing. I get a green light for a few seconds, nothing on screen, then back to red. Any help?