HELP! internal speakers not working

Hi! I was using my headphones, and when i disconeccted them, i can't hear anything . I go to system preference-sound and this is what i see...
There is not a red light in the headphone port.

Use the program Audio Midi Setup and make sure that the internal speakers are selected as an output device.
If that doesn't work you can reboot while holding down the option-command-p-r keys at the same time until you hear it cycle through a second time, hopefully followed by the start up chime. That will reset the PRAM.
Click here for more information.