PS2 will not play regular games and is clicking, only plays DVD games....Help!!

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I had the Neo2 chip installed on my PS2 and I could not get it to work. Well I had it check out for the third time to make sure it was properly installed and it is. Well now my regular PS1 or PS2 games will not play. I can hear the disc turning and then it stops. It also now makes a clicking sound. It will only play DVD games. Can someone please assist. Please post and email all replies.