I've opened it up before in attempts to fix DRE (which worked), but now when I just plug it in and hit the reset button, nothing happens...<BR><BR>There's this little blue card thing (I am so hardware ...

I got the slim PS2 at about the same time, and GT4 plays great. I'd try your other games, plus some DVDs, and see if anything else has a problem. Make sure it's not something simple like fingerprints ...