Did you try to switch the display modules between the speakers and see if the fault transfers to the other speaker? If you by this can make sure that it is the display modue that is faulty and not something in the amplifier section, then try to switch the different boards in the display module to see which board in the display module is faulty.

Som sagt så kan man använda en vanlig 3.5mm plug till 5-pol DIN. Vill man ha en mer avancerad koppling kan man titta på http://home.swipnet.se/ridax/beopc.htm för koppling till PC eller http://home.swipnet.se/ridax/ipod.htm för koppling av iPod.