Problems with a DTT2200 Creative 6.1 Speakers

[nelioabreu]

I own a DTT2200 6.1 Creative Speaker System that I had bought a long time ago. They have worked fine up until a fews weeks ago. Now I notice that during playback, the sound usualy goes down, and sudenly comes up, like if I was controling in the volume. I have checked the main board and I have detected no damaged condenser or IC. Can anyone help me solve this?

Thanks