I'm hoping that someone can shed some light on my problem. I've had a Denon AVR X1400H for a few years and everything seems to be fine except for one problem. When I play music from a usb drive via Heos,it shuts the receiver down after about 30 minutes. It only happens with when I'm in Heos. It has never shut down unexpectedly in any other situation. Playing music/movies through my Shield works fine. Same with playing content from my LG OLED. I've searched the internet for the last 2 days but couldn't find any solution. I've gone through settings, and checked wiring etc. I'd appreciate any advice.