Have sound, but lost use of volume keys? DV7T SE

Hello, Windows 7, just noticed as I almost always keep on mute. Mute button still working. Reinstalled sound drivers and updated. Windows updates are up to date. Virus scanned---nothing! On old vaio (sp) this happened and it needed a hot key fix but I can't find something similar for my DV7T SE... Can someone please help me see what I am missing. Again sound is working fine, but the physical volume buttons are not. Thank you

Can you do anything as far as volume adjustment when the headphones are plugged in? Do they work?
As far as seeing other options under the Sound preferences I would think that yes you should be able to see them. Just not able to select them. But I've never had it happen so I can't say for sure.
You might have some luck resetting the PRAM/NVRAM.
The fact that the red glow is coming from the port leads me to believe it's just that little switch is stuck though.

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