hello everyone! my computer has 2 sound jacks, one at the back for speakers and one at the front for headphones. they have always worked fine until yesterday i put headphones in the front and today the sound played on the speakers (aka via the back green sound jack) is very quiet, i thought it might be problems with the speakers first, but when i plugged the speakers through the front jack aka where the headphones were, the sound worked fine. please help me. your responses very much appreciated 
