Laptop speakers not working, but headphones do.

Hello,

I have been having a problem with my laptop for the past month or 2, and that is my laptop speakers are not working. I can only receive sound through the use of headphones or speakers plugged into the jacks. I have tried reinstalling drivers, but they never solved the problem.

When I look through 'Device Manager' the only problem I could find is that there is a yellow triangle next to my 'Base System Device', which is under 'Other Devices'. However, I do not know how to fix that problem as well - assuming my stereo problem and the 'Base System Device' is connected.

My laptop is an HP Dv2615us.

Thanks.