Windows 7 speakers problem

I have installed windows 7 i had vista before, i also have ubuntu. When i play a song in windows, there is no sound on the speakers but if i plug my headphones i can hear. I switched to ubuntu to see if the laptop speakers worked, and they do work. I don't know why in windows 7 the don't work.

Any ideas? I checked in device manager and "everything seems to be fine"

Everything worked, what you listed about the icon, it appeared...what more should i do?

Picture1.png Picture2.png Picture3.png

There is no on and off switch its a dell xps M1330, i cant find another driver, not even on the dell page...=S
Thank you Drew!

Well I is possible your hardware is turned off and doesn't shows up.
Press rightbutton in the screens you've send, click on turn turned off devices on.
Then look if there is a green balk playing anywere. Try to enable your device what you want to see enable.

I hope you'll find your solution soon!

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