I got a new battery for my PSP 1004. It seems third party, no SONY logo, 3600 V. I have CFW 5.50 Prome-4 on my PSP. The thing is since then I have occassionally random black screens with the green light turned on. I had it first at a scene in a game and then when I tried to copy sth via USB to the PSP. When such a black screen happens I can't even get my PSP turned back on. I have to put out the battery but when I put it back in it won't work. But when I connect the PSP through the AC adaptor the battery keeps charging and everything seems fine again and I even can turn it back on. Also: I couldn't copy the file with the battery in but with the adaptor (battery out) everything worked just fine. What could be the cause of it? Also: I opened it the other day to clean it but nothing serious happened and it seemed all fine after that. Still have this problems since yesterday. Any help?