well all you have to do is let the PS2 start up wth out a disk inside so the screeen that says browser and configuration pops up, then press triangle and the system info should pop up, go to where is says console and press triangle, the screen will change and ask if you want diagnostics on, thats all you gotta do, and it works like the PS1 settings, once you turn off the PS2 it goes back 2 off, all diagnostics does is fix the audio problem, and other minor glitches.
