After using my MAG 254 box for a week, the sound level has suddenly dropped on all channels so that I have to have the volume to maximum to hear it well. I have reset everything, re-booted, re- everything and still it's the same. Other equipment, DVD, TV all work fine. I've changed the HDMI and ethernet cables and can't think of anything else to alter. Volume is at 100 on the box. Anyone any ideas? I've contacted Infomir, but they've been less than helpful