Hi guys,

My computer has been running with Windows 8 for a while. And it has been playing its role well. And the sound is also fine. But today, I suddenly find that the sound in two stereos are different. One is louder and one is lower. But if I try to press the potentiometer of the sound volume, the sound in the two is with the same volume.

Can you tell me what's wrong with it?

Thanks very much!