Originally, my speakers were not playing any sound, but when I plugged in my headphones, I could hear it. I tried going to Control Panel > Sounds and then chose my speakers to be the "Default device." Now, my speakers work, but when I plug in my headphones, the sound still plays through the speakers and not through the headphones. So basically, I think the problem is that the computer cannot switch between the two without me setting one to be the permanent default one. I have an HP Pavilion dv2911us. Another interesting point to note is that the Quickplay strip doesn't seem to be working normally. When I press the mute button, it mutes the sound, but it doesn't turn red. This also happens when I try to adjust the volume. The volume changes, but the thing that pops up to show the current volume doesn't change. I don't really care too much that these don't seem to work 100% correctly, but maybe it may be helpful to know in order to figure out what's wrong. I greatly appreciate any help that is offered.