No sound. When it's powered down, and I'm plugged in, audio passes through to the amp. When I boot up the HX, the audio cuts out once it's up and running.   I didn't change any settings since my last session. Checked my cables - they are brand new, but checked them without the unit anyhow, they work.  I did a factory reset.  I have updated the latest firmware (2.54.0).   I've only had it for a little over a month. Any suggestions?