I just got delivered my brand new Klipsch THX Pro Media 2.1 speakers and subwoofer. As I plugged it in (all the cables are plugged in properly) I heard the vacuum sound in the subwoofer and then nothing happened after. There is no light on the adjustable speaker, nothing. I tried plugging it into my pc and still nothing. How can I fix this? I think it is power related since I am using an adapter on an extension chord, but even with that in mind it should very well be working. Please help me. I am using a 250v adapter from US plug to UK plug. With multiple extension chords used.