Trouble with my HP external sound

Hi guys,

I am having a problem with my external sound on my HP laptop. When I rollover the sound logo in the taskbar, a picture of a headphone appears instead of the regular photo of that is supposed to be there. The weird thing is that it appeared randomly earlier. It worked fine earlier on tonight when I was watching a video, but when I came back, that picture appeared even though I never plugged in any headphones or anthing. When I did plug in headphones a few minutes ago, you could hear sounds through it, but not through the PC speakers. Any help with this?