Previously, I had fan noise. Talked to the HK support. They are sending out another unit to replace. It's on the way.
For the past few days, I had new problems:
Sometimes, when I switch from one hdmi to another or the input resets, the image the receiver puts out is weid: all purple color on everything. I have to reset the input or switch to another hdmi and switch back. That solves the problem. Question: what is that? a sign of video processor about to be burned out? or....
What else to watch out when I receive the replacement unit in a few days?
(The HK support tech promised me to have the warehouse double check quality before they send out the replacement unit).