I bet any of you have same problem I have and never see this problem before when you see youtube problem first time. I never see this before for since my first computer. I usually use Firefox and use 3 or 4 on tabs. I watch the video on youtube, then I pause the video and use other tab to check it out like facebook, romhacking, come here and see anything news. Then you go back to tab on youtube then you click it to start play the video, but all the suddenly, there is no audio when you play. I thought it might my headphone or speaker problem. I test the music on media player, audio just fine, but youtube video go off the audio. How did that happen? They said clean up your cache. I usually to be like that but audio go off even I clean it. Any idea how did that happen to effect it?