Okay so my PSP 1000 is messed up. It all started when I tried to downgrade to 1.50, I used rains mms and pandora, installed, but when I went to turn on, the screen lit up but was blank. Later I was able to load onto 5.00 M33-4. I've been trying to update to 6.39 OFW so I could get 6.39 PRO B7, but when it gets to 99% it goes back to 84% and repeats. I turn the psp off and it loads into 6.39 OFW. However, when i try to use the 6.39 PRO B7 updater it goes in but satys black. I've tried this on other cfw (6.35, 6.20), but it doesn't work. I know gen 5.50 d3 works, but I need the new ones to play Modnation Racers. Can anyone help me?