My PS2 will not play PS2 games, but it will play PS1 games

SOURCE: Ps2 will not save ps1 games...

no u need to use a ps2 card i hd the same problem

SOURCE: PS2 reads ps1 games but not ps2. Clicking noise

Hi Jstpd,

Boot up your PS2 with no disc in it. Press the Traingle and highlight the top selection. Press the triangle again and then press X then select ON and press X. This should turn on Diagnostics. Do not reboot the PS2, just put a PS2 disc in. This might get it reading PS2 discs again.
If this does work you can follow the procedure for cleaning below:

I hope your in the right posting area, this is for the Phat PS2 consoles with the drawer that comes out to put the CD in. Procedure is different for Slim PS2.

1. Disconnect power and turn the case upside down.
2. Remove the screw covers to expose the case screws. These are little square pieces or square rubber pads. You can use a thin knife blade to pry the hard plastic squares up.
3. Remove all the screws.
4. Remove the Warranty sticker to the right edge of the power socket.
5. Turn the PS2 over to set it right side up.
6. lift the top cover from the back and pull it forward slightly to clear the CD tray. Be careful of a possibly Ribbon cable attached to the lid going to the Reset/Eject buttons. Roll the cover over to the right leaving the ribbon intact.
7. Remove the CD tray lid.
8. Polish the Laser lens, and remove any lint or hair from the CD area. Use Alcohol and cotton swabs to clean the laser lens. By the way, Alcohol will damage a PS2 Slim lens. All lens are not created equally.
9. Hook up the power and A/v Cables.
10. Remove the little white disc from the CD tray lid.
11. Place a Disc on the spindle, and cap the disc with the little white piece that you removed from the CD tray cover.
12. Boot up the PS2 and test it, Continue cleaning until you get it to work
13. Do not adjust the white gear at the top of the Laser tray. This is a critical setting that may mess up everything.
14. Put it back together, and you’re in business.

SOURCE: ps1 games

Are you receiving a disc read error? Or do they simply not load?

In either case, you will want to make sure that your laser is clean. This will require opening the console.

Just google playstation 2 repair and look for free walkthroughs...they are everywhere.

I would boil the problem down to 3 possibilites....

1. Alignment

2. Adjustment of the cd side of your laser potentiometer

3. A simple cleaning of your laser

SOURCE: ps2 games to play on ps3

you can only play ps1 and ps2 games on your ps3 if it has the same game region.hope this info helps your problem