My SDA II has two tweeters. One is not producing any sound. I confirmed that it is not the tweeter component itself. I pulled out both tweeters and I found that the tweeter that is not working has a white and a blue wire to it whereas the other tweeter that is working has a white and black wire. I suspect that this means something. I am not skilled at electronics - so my question: is this a "simple" problem that I could attempt to tackle myself or should I not waste my time and take it in for servicing? And if servicing is needed, would any repair shop do or must I use a Polk Authorized service person?