Sound but no picutre

[shadowblade]

My PS2 works fine but I was just playing wild arms 4 and when I go to a cetain point, when i change screen it stays black But I can hear the sound and nothing happens why I press the buttons on the controller I went to the same scene 3 time and it happens all 3 times, what shoukld I do?

HOw can I clean the disc?

 

[snoopdogg]

thanks for that dude!

 

[snoopdogg]

this worked for me! its realy good!