My friend just bought the wireless logitech system that has a wireless keyboard and mouse and the speakers have two wires. The only thing not working is the speakers. We have tried to plug the cord into a different USB drive, turning the computer off and on, reinstalling the program, downloading the updates that were available for it. The problem is when the light is on, showing power to the speakers, the computer doesn't even recognize the device at all. When the light for the power is off, the device shows up on the computer, but still no sound comes out. What else can i have her try?