Brand new Beats Solo 3. When I plug in two different 3.5mm audio cables, the Beats will not turn on. If it's already on, it turns off when you plug in a cable. (Regardless of whether the other end is plugged into the PC.) One of the cables has several comments on Amazon saying that it works with the Beats 3. I don't see any special instructions for using the unit with an audio cable. The manual just says to attach a 3.5mm cable, and doesn't say anything specific about such a cable. I hoping somebody here knows what's going on. Maybe I just got a defective unit.