Question about Denon AVR-1403 Receiver

1 Answer

Unit switches itself off

Unit is connected to tv and dvd player.
unit comes on for a couple of seconds then switches itself off and standby light flashes except if switched offf with remote control when light does not blink.
No sound at all; the kids are getting restless!!

Posted by thelij on

  • thelij Aug 08, 2008

    Thanks very much for your prompt and comprehensive response.

    I've tried unplugging the speakers and its still switching off so I think i need a technician.

    Much appreciated.


  • mosesmarks Nov 05, 2008

    I have the same problem. I removed all the speakers and connections but still having the same error. I have a multi-meter, soldering iron and some background in electronics. May I know the procedure to troubleshoot.

    Thank you.

    Big Mo



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What you are describing is the protect mode. These Denon receivers go into the protect mode for several different reasons.

Bad speaker connected - disconnect all the speakers and see if it stays on then when turned on. Disconnect speakers with power off. If it stays on then you need to find what speaker is bad and get it repaired or replaced. You can figure it out by connecting one speaker at a time with the power off and then turn it on. If it stays on, the speaker just connected is good, connect another speaker and try again. When you get to a speaker that causes it to go into protect you have found your bad speaker. Always turn unit off in between when connecting speakers. If the receiver turns off with all speakers disconnected you have another problem which will need to be diagnosed by a service center unless you have the proper tools and some electronic troubleshooting knowledge.

There are a couple of other reasons why these Denon's go into protect. A output channel is bad, a voltage regulator is bad, a supply resistor is open. Those are the 3 most common reasons for these.

I work at an authorized Denon repair center and fix a few of these every week. Unless it is a bad speaker it will require a lot of work. They are good receivers and normally worth the cost it would require for repair. Replacing the unit with another one of equal quality will almost always cost at least double the repair cost. There is no way to know just what the repair cost would be without troubleshooting it and then knowing exactly what parts need to be replaced. My shop would charge anywhere from $95 to $250 for this symptom, it just depends on which of the 3 most common problems is causing it.

If you have at least a multimeter and know how to use it, I can helpp you with figuring that out. If it has a blown channel the cost is the highest. The other 2 common problems only require 1 part each, a resistor which is less than a dollar, and the voltage regulator which costs only a couple of dollars. The blown channel requires many parts to be replaced and takes much longer.

Let me know if you need more help,


Posted on Aug 08, 2008


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