Here I am!
maybe try one of those cd lense cleaner things, sounds like your laser might be dirty or going bad
I would try the cleaner first. Then maybe contact sony if that doesnt help I think they fixed my friend's but they charged a little for it
I think you can also buy a laser replacement on some internet sites, but it probaly isnt so easy to install....
Or the last option is to do what another friedn did, go to wal mart, buy a new ps2-gut it and put it inside your ps2, put your old crap the the new one then return it to the store....not sure how much walmart checks the systems these days....and again i have heard it is a bitch to do.
And that, is all i know.