Toshiba Satelite L655 - No Sound

Hello,

I recently lost sound on my laptop.I had a video open on youtube playing through the built in speakers and when i plugged in my external speakers the sound stopped and would not play on the external speakers. I unplugged the external speakers and no sound is coming out of the internal speakers now either. I have tried plugging in and unplugging the speakers and have no sound for internet, media players or system sounds. I have tried restarting, uninstalling and reinstalling the audio driver but still have no sound. The sound in not muted and volume is turned up. I can see the levels in the volume control moving when music is playing. The computer is about 16 old and i have never had this problem before. Can anyone provide any suggestions how to get it working again? Please!