Sorry to say this but by the sounds of things you will need to buy a new PS2 laser. Go to
www.liksang.com or somewhere like that. They do PS2 lasers. Another site you may like to try is
www.playstationchips.co.uk. I don;t think they are too expensive, but I haven't really looked at the prices of the lasers. Sorry to be the bearer of bad news but thats just the way it is. I would like t hear how you get on. Just post a reply here, I have subscribed to the thread.
Good Luck,
LUFCfan