Question about Denon AVR-2105 Receiver

4 Answers

Power Button Flashing Red

Unit kicked of and power button flashed red while watching/listening to Music DVD--admittedly at a high volume level. Allowed to cool down over night. Just tried powering up again (14 hours later)--power button shows green, appears to be starting up and then shuts off and begins flashing red. Happens every time. Please advise if you have any ideas short of contacting Denon tomorrow. Thanks.

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  • scollins121 Feb 27, 2009

    As soon as the unit powers up it kicks off then flashes a red ring of light around the stanby button. Is there any one else who has resolved this issue short of swapping tranistors?

  • imoda4 Mar 09, 2009

    I get flashing red button too.



    I was playing in surround mode at about 50% volume and a few blue sparks and a puff of smoke later and its all over. I was planning on having it repaired but after reading other comments it's seems it will be an ongoing problem. Ive got Aaron ATS 5 speakers by the way with the same low impedance.



    I had a Yamaha before and it never gave me any problem for years and years.

  • elco-fixer Apr 18, 2009

    Just managed to repair AVR2105 which had same symptoms as descibed above. Replaced a pair of output transistors and some o/c resistors etc. The only problem is the amp is generating too much heat. I guess quiescent current for output transistors needs adjusting, there is a trim pot near them and a socket to plug test wires I guess. Anyone knows how to adjust quiescent current and to what value?
    thanx

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4 Answers

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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

Speaker wires LOL wish it was that simple mate.
The real problem is denon now have their products made in third world countries and are no longer made in Japan.
They still charge top dollar for their products so, there is no excuse for them to have such lousy service policys.

I was scammed by denon for over $1200!

Not to mention the 3 times I had to unhook my complete home theatre system and the inconveinence of not having the amp as the central switching unit for several months.

I'm going back to YAMAHA, allthough I don't know about their customer service as in all the years I have owned YAMAHA products I have never had a problem.

Posted on Aug 03, 2008

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Yep same thing happened to me three times!
Completely dead!
Twice under warranty and once out of warranty.
Denon Australia don't want to know about it and basicly said BAD LUCK !

FRANK from Audio Products Group ( Australian denon distributors) even admitted there was a problem with that (and other denon models) of a fault on the the power output stages and claimed my amp was fully upgraded on the second time in for repair and will not give the go ahead to have it repaired out of warranty
I argued that the original problem was never fixed but FRANK from denon Australia didn't want a bar of it so I suggest taking the shocking (bordering on criminal) after sales service into consideration when thinking of buying any denon products.

NEVER BUY A DENON FROM AUSTRALIA be warned.

Posted on Jul 19, 2008

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Check to make sure the +/- speaker output wires aren't touching. I've had this problem before with frayed speaker wire strands poking out & intermittently shorting to the other polarity speaker output. This amazing receiver actually continued to play at low volume levels, but if I turned it up it would shut down similar to how you are reporting. I cleaned up the frayed wires & this fixed thr problem. Good luck

Posted on May 26, 2008

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SOURCE: Power Button Flashing Red

Try unplugging the entire unit and letting it sit for 5 minutes. See if this helps. If not, you need to do a complete reboot, which will cause you to lose your settings, but will probably solve your problem. To do a complete reboot, you will need to hold down two of the front bottons on the front panel. I'm not sure which, so either consult your manual or see other posts here which describe the reboot process for Denons. Hope this helps.

Posted on Jan 05, 2009

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Posted on Jan 02, 2017

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