If I'm correct the iMON/iMedian software provides the connection between my PC and my amplifier and from there to my TVset and my speakers. For some reason, after replacing my powerunit, the blue circle in your icon was changed into a yellow circle, but that didn't cause any problems, as far as I know. Now the yellow circle became white. There were no changes at the system done by me. And now there is a problem. Visual there are no issues. My TVset still displays the same screen as my PC screen. But my speakers are lost. Somehow my PCsystem can't find my speakers anymore. So, if I'm asking this to the right people, please help me.