There are 2 cables which came with the product - one for Ipod connection (installed) and one for PC connection (loose) which I have lost. The former worked for a good while off my laptop. but then the problem started. The same happens when I use the supplied phono adapter to plug into my amp. I have unpluged and repluged the cable several times. Could it be that I need the lost cable, or will I have to send it off to B & W for repair?