Question about Denon AVR-3300 Receiver

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I have a Denon AVR-488..Can you help?

Sometimes my receiver shuts off and a flashing red light blinks. It doesn't always happen after the same amount of time. I have about 2 inches on either side of the receiver and about 10 inches of space on top and about 6 inches in the back. I think this is proper ventilation. Do you think there is a problem with my receiver?

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  • albanyemu Jan 11, 2009

    i have just finnished hooking up my denon reciever to my BA speaker set and i am getting mostly a thunder or high pitched whine. I tried running both a cable box and a dvd player to the reciever(both of which work with my onkyo system), and on both i get either thunder or a high pitched whine. Occasionally the sound will come through for a min or 2 and then back to the distortion. I have used 2 seperate toslink cables, and a digital coaxial cable all with th same result so im 99% sure its not the cables or components im using. When the sound does work i am limited to only a few processing modes.... neural surround works, dolby dts does not, vitrual works 5 ch stereo does not, seems kind of random to me. I am fairly adept with electronics but this has me stumped. I figure its a problem with the digital processing on the unit and i probably need to take it back, but if anyone has suggestions it would be helpful.

  • paulzarembo Feb 16, 2009

    I have the same problem with my Denon AVR 488.  It worked for a while, then would shut off.  I added a fan and then after a few months it would no longer keep it from thunder, whine and no sound.  This happened on any mode including tuner, it seems that it will play longer when just using the front two speakers, sometimes it won't happen unless al 5 speakers are connected and playing.  I sent it back to Denon and they replaced HDMI board (they sent it to another repair facility because they were too busy).  The new HDMI board lasted about a week before the same problem occurred after it being on 3 hours. It didn't make sense it was the HDMI board if this happens in tuner mode. Now it won't stay on for a few minutes before failing.  I think it is a design problem.  I've heard another person having to replace the DSP board a couple times.  I just want my money back.

  • pbenvenutti Apr 16, 2009

    I purchased the exact package you did from Circuit City(now out of Business) I thought I had wired something wrong. Once I had a friend came over and check out the problem I was having the thing wouldn't work at all. He took it to his shop and the next day called Denon for advice. Was able to reset it and it worked fine for a few days then failed again. It is all by its self with plenty of air for cooling. I will call for a RMA and send it back to the factory.



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The fans are a poor design the cool the amps inside. I could cook tacos on top of mine. Years ago I developed an external fan the velcros on the rear of the unit. Just find a silencer pc fan from pc power and cooling. Someone will be selling it online. If's a very low noise fan and will not disrupt hi fi output. Attach a plug in transformer to the power wirers on the fan. Make sure it is the correct mV, and amp rating for the fan, and just plug in to the 3300's switching ac outlet on the rear of the Denon. The fan will stick on the denon's outer case on the rear of the unit where there are a few vent holes with velcro. I did that so no warantees were broken by opening up the unit or drilling into the case. I have in instructions if you would them in a document. Just email me at and put Denon Fan Instructions in the subject line. Enjoy, BWA

Posted on Jul 17, 2008


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