Hi Okay this problem is driving me slightly insane...

I actually called in a dell engineer to help fix it but he completely failed. (as expected). Okay so the problem is: My speakers are absolutely fully functioning, they work...
Hi
Okay this problem is driving me slightly insane...

I actually called in a dell engineer to help fix it but he completely failed. (as expected).
Okay so the problem is:
My speakers are absolutely fully functioning, they work perfectly when a test is run on start up. I.E. they output beeping sounds.
However when the operating system loads up, there is no sound. If I use headphones it works fine, but the speakers don't output any sound on their own.
So the tech guy changed the internal speakers- still the same problem-and then checked out/updated the drivers which left us with STILL the same problem...tried it in safe mode-still the same problem.
Is there any kind of *easy* solution to this that we're missing?
I'm still waiting for a response from Dell, but don't expect anything really.
Any help would be appreciated!
Audio= Sigmatel Audio
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Dell Precision M4300
Intel Core 2 Duo
1.80GHz
789 MHz
1GB RAM
Microsoft XP SP3