Brokened PS2

Okay, so, here's the deal. My PS2 cannot read discs. At all. I purchased Suikoden IV three days ago. It has been out of my PS2 only once since then, so I could try another disc. It's basically in mint condition, fresh out of the box and right into the PS2. Same with the other disc, which I should mention was a music disc. The PS2 can't read either disc. Nonetheless, I repeatedly get disc read errors. Intially, if I left the PS2 alone a while and tried again, I could load the disc (after a couple reboots.) That no longer works. I'm going to run out and get some compressed air to try to clean the lens. Anyone know anything else I should try?

Anyone unusual grinding noises when opening the tray?

Also, the laser might be fucked but it can also be the case that the laser isn't positioned correctly. About an inch or two above the laser is a small plastic dial. If nothing else works then mark the current position with the tray fully inserted and then attempt to reset the dial by hand and test each position you try to see if you still get read errors. It can take some experimenting but as long as you mark the original dial setting of the laser then you can always reset it to it's original. position.