Boston Acoustics MicroMedia Computer Speakers "energy subwoofer sound" Questions

...subwoofer and speakers as an output device for my iPod. It just stopped working last week - when the unit is plugged in, the power light doesn't illuminate and there is no sound. Is there a fuse on ...

...subwoofer. They do work, but not completely perfect somehow. If I turn the speaker's volume to MAXimum ( Computer volume controls checked and adjusted . . . so I don't think the trouble is there ) . ...