hello, a couple days ago, i used pandoras battery and magic memory stick to downgrade my psp 3.80 to 3.71 m33. I went to recovery mode and tried to install a xmb theme, but when i went back, it wouldnt show the screen. now when i urn on my psp the green light is on but the screen dosnt show up. ive tried hold R down and turning it on, but it dosnt go to recovery mode. can anybody help?