What do u mean? U mean the disc wont spin even after u close the tray? Look carefully at the tray(cover) when u open it. There is a plastic which protudes downward that goes into the hole when u close the disc tray. Press hard(downwards) on that part when u close the tray and eventually the ps2 might be able to receive the hint that there is a disc inside and that the tray is closed. Of course dont give it excessive force to the extend that it'll break ur ps2. Try it few times. If that doesn't solve the problem then maybe u have a dead motor. I guess the motor used in these system are brushed motor.

Btw my ps2 had the scrathing problem too. Sony sucks at making proper optical reader. My bro's Xbox was used a lot more often than my ps2 yet his Xbot is still in good and functional shape. I dont quite remember, but they have mention about white cogs or something which related to this problem few years back. I dont think I can dig out the older 2005 threads.

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Added on December 28, 2008, 12:09 am

It is a shop, dude. Bernard Moh own it if I'm not mistaken(unsure since I dont live in KL). U can also try pm e-kai(or izzit ekai?) to see whether he can help out with the technical details or not.