Originally Posted by shunx
I'm having difficulty determining the cause of my X4000's problem, and would appreciate some feedback: I've been having the random shut down issue (red blinking lights) with the receiver since the summer of 2014. The problem went away for a few months after I swapped an old speaker wire, but it recently came back for no apparent reason. Last month it would shut down even with no speakers connected. Denon suggested a microprocessor reset, so I did that, and it ran ok with two speakers several times, but after I connected more speakers, it would shut down again. But today I switched the center speaker and it's been running ok with L/C/R+sub speakers for a couple hours -- but that doesn't mean the problem won't come back. Basically I'm not sure what's wrong: the receiver, one or more speakers, one or more speaker wires, or something else.
Do you guys think I should keep testing this, or try to send it in for repair even though I haven't isolated the problem?
Welcome to the "Protection Mode" club! You have
been reading the thread, right? I only ask because the way you framed the question made it seem like you think your problem is unique. It's actually scarily common with the X4000. The type and number of speakers you use (my setup is completely different) seems to make no difference.
I spoke with Denon technical support and, of course, they don't know of any "particular issue" with these premature shut-downs. Of course.
I then called United Radio, the "factory authorized service center" in New York and they seem to have a lot of these units coming back for this problem. Their solution, according to the girl who answers the phones (They won't let you talk to an actual repair tech -- she says they don't have any phones back there. Probably interferes with their gas lanterns.) said they typically "replace a few transistors" and ship it back out.
What I want to know, what everyone
who has suffered this problem wants to know, is what is causing it?
Is is some design flaw? If it's this common it must
be, right? And what is the repair protocol that can permanently
fix it? Denon doesn't even seem to be aware there is
a systematic problem with the protection circuit. Or, more likely, they are
aware and just won't admit it.
I've got too much invested in this thing to just pay the freight to ship it up there and have it come back with the same problem that will manifest itself again after the warranty runs out. Which, in my case, is in about 3 weeks.
my post should have come before DeuceNine's post above. Caught me in a edit/delete/repost (AVS doesn't give you enough time to edit a post before adding the edit tag). But thanks for the info Deuce.