I never had any luch with the ps2. When I got the original it wouldn't play any dvd's besides anime for some reason, and wouldn't play ps1 or blue ps2 disks. When I got the slim, after a little over a year it became choosey about which ps2 games it would play, and didn't want to play any dvd's. I find them to be relatively untrustworthy systems.
In my experience I learned that a lot of problems with the slims stem from the lens being scratched or damaged. maybe you should have someone look at that, if they know what their doing anyway.
I got it at an auction for $40. I had a Phat PS2 until I got mad cuz I kept losing and ummmmmmm... nevermind. It worked perfectly!!!! I think I might buy a new eye for it from one of the sites below: PS2 Parts ConsoleShop