I'm having a problem with my recently unbricked PSP. Last night I was fooling around with a newly downloaded theme and accidently deleted the wrong files in my flash0, and then I had to follow that by turning my psp off. We all know what happened to my psp then, but successfully I turned my only battery into a Pandora Battery today, and my 1G stick into a magic memory stick. After much tinkering I downgraded to 1.50 using the pandora battery, and now my psp is functioning once again. Now, 1.50 is great and all, but i'm having problems loading any homebrew applications, and all my UMD's will not work with 1.50. Now here's the main problem: After upgrading (successfully) to 3.40 OE-A on two different occasions, it's left my PSP bricked after the coldboot. (not so successfully actually) Recovery mode wont start either. I know it's not the battery because I turn my PSP on only with the AV adapter and my 4G stick. I've also tried upgrading to 3.52 M33 with no luck either.. What's strange is it doesn't shut off, the green power light just shines on, but i'm getting no response from my PSP. I can downgrade back to 1.50 but without homebrew or UMDs, my PSP is not alot more than a fat chunky MP3 player. Could this problem have to do with the way I caused my first brick? Anyone have any ideas?