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Denon AVR-686 will not turn on

When I push the standby switch to turn on the receiver it turns green, then flashes a few times and I hear a click, then it turns red (off)

Posted by Anonymous on

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 54 Answers

SOURCE: Denon AVR-1601

This is a very common problem with denon receivers of the 2001-2-3 vintage. On almost every one, there are 4 little "surge" resistors in the power supply. These werent quite robust enough from the factory and one day would just burn open for no reason. Well, actually there is a reason, the "surge" that happens every time you power the unit up eventually weakens the resistors and then they pop. You need to take this to a denon service shop as I GUARANTEE they have seen this before. They need to check resistors in the picture, locarde above the **** rectangular connector. Resistors numbers R141, 142, 148, 149: 75f69d7.jpg These resistors when measured, should be less than 10 ohms each. If they are more, then they are blown. If they are blown, then have the shop check the channels for blown output transistors. If the outputs are OK, then these resistors should be replaced with 1 ohm 1/2 watt metal -film flameproof resistors. You might need to be prepared for a large bill, because the entire unit must come apart to replace the resistors, however, just checking them takes only about 10 minutes... Good luck and don't try this at home. Rob

Posted on Apr 08, 2008

  • 1 Answer

SOURCE: denon avr-2106 problem!!!

You're drawing too much power from it. Sounds like maybe your sub is hooked up wrong, double check that.

Posted on Jul 06, 2008

Foxyjay
  • 13 Answers

SOURCE: Denon AVR-1508

If your amp looks like it's going to work as normal (ie the front display lights up as it should etc), but then the amp goes into protection mode when the anti-thud circuit times out, then I know what's likely to be wrong.

It's one of the power amplifier channels which has gone faulty.

I just found this out after having this problem with my AVR-1906.

I took the amp apart and de-soldered the suspected channel power transistors (centre channel in my case).....and hey-presto! it fired up as normal (obviously the centre channel would be out of service).

I have ordered the replacement transistors from Farnell (UK) at a miserly cost of around £2-£3 each.

Just waiting for them to arrive.

An alternative is, if you don't use all your channels, take the transistors from a known working but not needed channel and swap them over with the duff ones.

Hope thats of use!

Posted on Aug 16, 2008

petraman7
  • 1175 Answers

SOURCE: Denon AVR-1705

It's probably NOT the capacitor.
I repair these kind of things for a living.
It's most likely a power transistor or two.
And it shouldnt cost 300 to fix either..Unless the tech is incompetent.
Dont let someone rip you off

Posted on Apr 20, 2009

  • 5 Answers

SOURCE: Denon AVR older receiver but worked fine; now

Did you try to reset the unit? Resetting the unit has fixed every problem I have ever had......turn off unit.....hold down A+B at the same time then turn the unit back on...hold buttons for roughly 3 seconds....Let me know if it works.

Posted on Mar 09, 2010

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1 Answer

No power output or display.green standby light flashes.


Sounds like either a blown mainpower fuse or the thermal fuse for the power transformer. If the protect circuit was kicking in, the display would light up, but then turn off with a red blinking light. the green light with no display means the transformer is not getting power.

Dec 31, 2013 | Denon Avr-1610: 5.1 Ch A/V Home Theater...

1 Answer

Reset factory settings of my Denon avr 2800


From Denon support:
To reboot, turn receiver off using the small on/off button, not the big standby button. While off press the night and pure direct button at the same time and keep holding them with your right hand while pressing the small on/off button with your left. You will see your receiver menu flash. When you see it flash let go of the night and pure direct button and the receiver will reset it self to the radio station 87.50. The receiver's microprocessor has now been set back to factory default.

Sep 08, 2013 | Denon AVR-2800 Receiver

2 Answers

Denon AVR-1908 won't power on


Are you getting a standby light at all? Is it flashing? Do you here a click when you plug the unit in? If the answer is no to all of these then you blew a fuse. If you do have soome sort of standby light, then your set is in protect mode. More than likely for a blown channel. If no lights, but you ar egetting a click, you could have a bad transformer. Use a DVM and see if it is open or not. Good luck

Aug 23, 2012 | Denon AVR-1908

2 Answers

Denon avr-1506 will turn on then flash red and turn off... how do i make it stop or fix it??


In most AV receivers if the standby light flashes after turning on and you don't hear the regular click of the relay engaging after 4 seconds, indicates an output short or amplifier failure. The protection circuit prevents any further damage by not turning on system.
You will need professional help to fix this problem because even to a electronic enthusiast the construction of a typical AVR is not service friendly.

Jul 01, 2011 | Denon AVR-1506 Receiver

1 Answer

The green light flashes when power is turned on and then flashes red and turns off. Can this be reset ?


what do i do when my DENON AVR-1506 turns on then flashes red and turns off?

Mar 08, 2011 | Denon AVR-1506 Receiver

1 Answer

I have a denon AVR-1604. It was working fine but started to hear a relay clicking on and off as it was playing. Now when i try to turn it on from standby i hear the relay click as i turn it on with the...


the noise is the speaker protection switch ( reset relay) disconnect all speakers see if it stops if so then conect speakers 1 by 1 untill you find the crossed speaker could just be a crossed wire best of luck


get me back if you need more help

Dec 31, 2010 | Denon AVR-1604 Receiver

1 Answer

When I turn the unit on, it turns off in a few seconds. There is a flashing standby light.


Power switch relay needs replaced. Its a small black box with a clear piece that comes off, it would be hard to replace yourself.

Apr 05, 2010 | Denon AVR-1601 Receiver

1 Answer

Denon AVR older receiver but worked fine; now


Did you try to reset the unit? Resetting the unit has fixed every problem I have ever had......turn off unit.....hold down A+B at the same time then turn the unit back on...hold buttons for roughly 3 seconds....Let me know if it works.

Aug 20, 2009 | Denon AVR-1908

2 Answers

Denon AVR-1705 won't power up


when i turn it on it stays on for 3-4 seconds then shuts down

Jun 27, 2008 | Denon AVR-1705 Receiver

2 Answers

Denon avr-2106 problem!!!


You're drawing too much power from it. Sounds like maybe your sub is hooked up wrong, double check that.

Mar 06, 2008 | Denon AVR-2106 Receiver

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