I have a pioneer VSX-819H-K (https://www.pioneerelectronics.com/PUSA/Home/AV-Receivers/Pioneer+Receivers/VSX-819H-K) and It has a problem of sometimes not playing sound. It will be perfect for 30 minutes then all the sudden it will cut off, then there will be no audio from any of the ports (I've tested them all). Some days it works perfectly the whole day, some days it won't work at all. It's starting to really piss me off because I can't seem to figure out what the problem is. I found that if there is no sound and I leave the device on for two hours with nothing plugged into it, then it will sometimes work again but I can't tell if this is mere coincidence or if I'm onto something. Any help, suggestions, or anything would be much appreciated.