My room mate just received Guitar Hero 2 for his birthday along with 2 wireless guitars for it. He's been playing it on his playstation at home and it's worked fine. He brought it back to our room and now we are having some problems. I have the thin version of the PS2. While he was playing he was getting a lot of lag. Now the playstation isn't even connecting. When we reboot it it starts up but no video is displayed, just the audio. We've tried unplugging and replugging everything back in but still no luck. Any clue on what's going on here?