No Sound on Emachine Notebook?

I am working on a friend's EMachine Notebook Model #M2352, running WinXP Home SP2. I had to do a complete reinstall/recovery via the CD's and now I have no audio through the notebook's speakers, but I do have sound through the headphones. In Device Manager, it has no checkmarks or exclamation points under Audio, except for one exclamation point at "Standard Game Port". All listed there are "enabled". In Control Panel, when I click on "Sounds and Audio Devices", "AU Audio Wave" is the default device, and nothing anywhere is muted. I tried to update and reinstall "Audio Drivers" via a download from the EMachines web site, with no luck there. I have no idea why I would get sound through the headphones and not through the speakers?!!! Any suggestions? Could something be wrong with the Audio in the Motherboard, and if so -- how can I check that out and what would I do? Thanks in advance for any wisdom you all can bestow!!! Shanrene

 

Thank you Halo for your reply! I did what you suggested, but no go. Still no sound from the Notebook's speakers. I'm thinking that if the audio works through the headphones, but not through the speakers that this may not be a driver issue?! I just cannot figure this one out. I installed Everest and found that my Audio Device is named "ULi/ALi M5451 AC-Link Controller Audio Device"; the Motherboard name in Everest is listed as "Arima ShadowK7" -- neither of which I have ever heard of. Could this be some kind of hardware issue? Any suggestions on what I can try next? Thanks so much! Geeks Rule!!! Shanrene