How to connect Logitech speakers L321 to my PC?

[PeterChin]

Power is flowing to the speakers (main + 2 small side spkrs) but no sound. Do I need a USB to connect to PC or what should I do?

 

[faalin]

plug the green 3.5mm jack into the computers green headphone port on the back of the computer.

 

[burdenbound]

From the looks of it they use a regular 2.5mm/3.5mm audio jack, do you have this connected to the input on your computer? It's possible you have it connected to the incorrect port.