Sound through headphone jack, but not laptop speakers

I usually listen to music with speakers through the headphone jack. When I unplug the speakers, the music plays through the stock laptop speakers like it is supposed to do.

However, all of a sudden, the sound has only worked through these external speakers. It plays fine through the headphone jack, but when I unplug the speakers, the laptop speakers do not work.

I have restored the computer to an earlier point that I know they were working, but still nothing.

The laptop is a Dell Inspiron E1705.

Any help would be appreciated.

roughneck

I don't know what happened, but they are working now.

roughneck