I have a v10 ps2 with an unknown modchip which used to play all my ps2 backups from cdr- and dvdr- automatically with no problems. It then suddenly refused to play any kind of disc at all, which led me to believe it was a problem with the laser. So i first tried cleaning the lens with rubbing alcohol which didn't solve the problem, so then decided i to have the laser replaced. Now i have a brand new laser but it still will not load up any of my backups from cdr- or dvdr-, however it will load both my original ps1 and ps2 games. Could fitting a new laser have somehow disabled/broken my modchip, or is there maybe something wrong with my board? Any thoughts, suggestions or help with this would be greatly appreciated as it has me baffled and i have no idea what to do next to correct it. Thanks.