“怎么没有声音了？”英语口语怎么说？

Why no sound?

What happen to the sound?
What's wrong with the sound?
Why the sounds are gone/vanished/away?

因为楼主问口语的用法，所以答案可以有很多．．．但最简单,意思最清楚明了的:why silent?

where does the sound go?

what's up?

hello?? did anybodies here??