Chipped my first v9 (UK SCPH-50003) yesterday with a Matrix MXL 2. When I first powered on all I got was a black screen, then I turned it off at the back and tried again. I get RSOD most of the time, but now and again a DVDR/CDR boots up, sometimes the PS2 logo is corrupted as well. Still it works, though I haven't tried PS1 games yet. This is the first PS2 I've chipped thats had this problem. Weird???