Problems with Denon AVR-X4000
I am also having a problem with my Denon AVR-X4000 shutting itself off randomly. This receiver has performed flawlessly since I bought it last November, 2014. About two and a half months ago it shut down for no apparent reason; the green pilot light turned to a blinking amber light.
I turned it back on and didn't have a problem for almost 3 weeks. More recently, it has been shutting down about every 2 hours. After reading
about similar experiences on this forum I made several minor changes. First, I used banana clips for each speaker connection but the problem continued. Then, I unplugged my iPod Touch from the front USB port. The unit stayed on for more than 24 hours straight without a problem
but a few days later it shut down after about 2 hours. Finally, I unplugged the receiver from the current surge suppressor and plugged it in to
another one which was connected to a different outlet. Again, the receiver stayed on for almost 24 hours straight until I turned it off. When
I turned it on a few days later it shut down after less than 30 minutes!!!
My overall reaction now is WTF! Because many other owners of the Denon AVR-X4000 are having the same problem means this unit probably
has a design flaw; the thing puts out an excessive amount of heat and that may have a lot to do with it. I haven't contacted Denon tech support because I'm sure they will say "try this" or "try that". Also, they probably know exactly what's wrong but are under orders from upper management
not to discuss it. I've already done everything I can and since the problem is so intermittent I doubt that any technician could make a successful repair.
If you have had this problem and have found a way to solve it, please share it with the group. Thanks very much.