ps2 problem
 

I tried to put a Blue chip advance in my 50002 ps2.It would not work at all so I took it back out.Now it will not play ps2 games or DVD's but will play ps1 games.It recognises that a ps2 disc is in it but says "no data".Any ideas.

Make sure you dont have any solder blobs of splashes bridging any pins. If you never installed a chip before you may want to get a Pro.