Hey guys. I have this weird problem.. My new psp is running 3.52 m33 firmware, & each time i press home/brightness/sound button, the screen will go black, & i cant do anything to bring it back except for flicking the power switch twice to off & on it. When the screen is black, i can still hear the game sounds or XMB clicks. When i first got my psp it came with 3.51 m33 firmware and it had a similar problem. If i tried to boot into recovery mode it would just show a black screen. but one day i pressed the brightness button in the black screened recovery menu a few times & it just appeared & begun working as if there was nothing wrong with it.