speakers

I've tried many solutions from online, but for some reason, only the left speaker of the two Altec Lansing speakers work. Can someone please help me with this?

My on board speakers work fine but when I plug in the headphones, I get no sound. The only way I can get the headphones to work is to restart my hp laptop with the headphones plugged in. But once the laptop goes to sleep it won't read the headphones anymore and I have to remove them to get sound...