Logitech Usb speakers sometimes dont work

I bought logitech usb speakers s 150 with my new pc. Some times it wont work. If i restart my system it will work..
Light on speaker is on but no sound. when i opened sound settings , usb audio speakers was missing. When i restart my system it will work..

 

any more clues in event viewer logs, errors, warnings

 

I have seen this problem a lot (too often) with USB speakers. The problem is typically on the USB side, not the speaker side as USB drivers must be loaded first. You can try a different pair of USB connections (there are often more than one USB controllers on motherboards, so another pair may get you a different controller/hub).

However, if your speakers will accept a standard audio connection instead of USB, I would use that - at least while troubleshooting this issue.

 

Thanks for the replies . i think u r right ..i googled this issue and a lot of people are having this issue with usb speakers..
Now my speakers are in working mode..if its not working , ill simply restart my system