I got this used PSP1K for $50, and I have a feeling that the reason it was being sold was because it was defective. The volume buttons, as well as the home button and I THINK the mute button, all will randomly toggle on their own, rapidly. The Memory Stick will also randomly connect and disconnect on it's own. I'm not really sure what to do in this situation. What I've tried: 1. Pulling the battery. 2. On and off. 3. Standby. 4. Removing the memory stick and reinserting (several times). all of these pull null results, with it simply resuming where it left off. can anyone help a brotha out? (running 6.20 PRO-B5, if anyone is wondering, although since I got it at 6.31 (upgdating to 6.38 and downgrading back) it has been doing this as well) EDIT: Dammit, it keeps asking if I want to quit a game while trying to play, scrambling and hyperspeeding my movement controls, and I can't even use USB Connection because of it rapidly quitting.