Question about Denon AVR-1603 Receiver

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Stopped consistently producing sound

This 3 year-old Denon AVR1603 receiver has been trouble-free until recently. Now it's hit & miss whether it produces sound or not. I turn on the TV, then the Denon, route the TV sound through the Denon, and it may or may not produce sound. Stranger yet is that sometimes it waits 3-4 minutes before producing sound. I've seen the same behavior with DVDs and CDs. The Denon recognizes the input source and the cable it should be using, and recognizes the digital signal, but stops there. "Sometimes" I can get communication between the TV and Denon by unplugging and replugging the coax. I also discovered the cable from the subwoofer to the Denon was not making a clean connection, so I swapped it for a new cable. I have it hooked up to a Pioneer DV C503 DVD/CD Player, Scientific America Digital Cable box, a Mitsubishi HD-1080i TV, and a Niles SPS-4 speaker selection box. My surround sound speakers are Paradigm OM-100 with Paradigm center and subwoofer speakers. External speakers are routed through the Niles box. I'm using an optical audio cable to the DVD player and a Coax to the DVR. I've taken the receiver and coax to an authorized repair center, who tell me everything is working fine. I tell them I'm still having the problem, and they want me to break the system down and bring it all back to the shop. Any ideas would be appreciated. I'm stumped. Thanks in advance! Brian

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4 Suggested Answers

SOURCE: display on but no sound from any input

I have a similar problem. I connected a Toshiba HD-a2 dvd player and cannot get digital audio from any of the hd movies. Regular dvd's play just fine. Toshiba told me the receiver is to old and can't process the new format. I was wondering if there is an upgrade for the receiver or any other way I can get 5.1 out of this receiver with out having to get a new one..

Posted on Jan 07, 2008

  • 4234 Answers

SOURCE: Connecting Denon receiver to DVD player

Normally the optical inputs are disabled unless specifically turned on. I dono't know your specific model. I'll research the model and update this with more specifics.

Posted on Jun 17, 2008

  • 2267 Answers

SOURCE: Connecting DVD player to AV receiver

If you've done that already and still no response from your system, I would suggest to take back to the place where you bought it and ask them to check it for you. Tell them that you follow the user's manual to the "T" but still unable to make it work.
Good Luck.

Posted on Jun 20, 2008

  • 1 Answer

SOURCE: No sound from optical or coax digital inputs

You have to use the system setting using the remote and turn on the inputs you want to use. Hope this helps.


Posted on Apr 12, 2009

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Denon AVR1603 RESET

Starzy, to reset on a Denon AVR-1603
  • power off the unit using the front panel Pwr switch
  • press and hold SPEAKER A and B buttons;
  • keep pressing on the speaker buttons, switch on the AVR
  • when the display is blinking release buttons Check the attached links,instruction and guides, Good luck
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Denon AVR 1603 Operating Instructions Manual Last Function Memory...

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I have a Denon AVR1603, recently I plugged computer in AUX connections at rear (not loud) and it kept tripping out. Eventually it tripped and now the the on/standby light fashes but nothing else happens....

The LED flash indicates that unit goes into protection. Check the power transistors, the 0.22 ohm or 0.47 resistors in the output of the transistors.


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No sound

1. check if the amp is in PROTECTION mode (might be a bad speaker or shorted output)
2. check the 'MUTE' switch
3. try to use the FM/AM mode to isolate an input source. If there is sound then check input source.
4. ...still no sound have a techinician check it.

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