Ok, the problem is as stated above. I've just received my newly purchased Yamaha rx-a3010 as I wanted to have the ARC facility. I have married it upto my LG plasma and carried out all the settings as per various sites. The ACR was working okay until I decided to plug in my cyclone media player and it stopped. If I unplug the media player the ARC starts working again. I use the cyclone to stream movies etc from an iomega network hard drive. I have tried various work arounds but the only real way to connect the cyclone up is with HDMI but this is causing the problem. Any ideas, apart from getting rid of the cyclone?