No sound through main speakers

Hi everyone,
I'm not sure if this is the right place for this as i'm new on here,
I turned on my comp the other day and i couldn't get my laptop speakers to make any sound, i plugged in ear phones and i can get sound through them just not the main speakers.
After mucking around (i cant remember what i did) I managed to get a song to play through itunes, but no other programs.
ive turned my laptop on 3 days later to no sound at all not even through itunes. Ive looked through device info and all seems fine, nothing is muted, and i dont know what else to do.
The computer is a 13 month old hp pavillion dv7

please help!
 
Take a look in the device manager and see if there are any yellow exclamation points in the list. Tell us what you find
 
You also might want to uninstall then reinstall the audio drivers. Download the latest drivers from the audio company's latest instead of the ones on the makers support web page unless they have been recently updated.
 
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