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AVR-2105 double video failure

Discussion in 'AV Receivers & Amplifiers' started by kuyper, May 26, 2005.

  1. kuyper

    kuyper
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    My Brother-in-law bought an AVR-2105 a few months back to replace an ailing Rotel pre-amp. It's a small room and the 2105 is perfectly adequate and, in fact, a huge improvement over the Pro-Logic-only Rotel.

    All was fine for a month when suddenly he lost video. All components (VCR, DVD, Digital Cable) are S-Video switched through the 2105 to an RP-TV with the intent of upgrading to component when he replaces the TV.

    The local dealer switched it out for a new unit, no questions asked, but now, another month later, he's had exactly the same problem.

    While watching a source, the video will suddenly fail. Audio is fine. Power-cycling corrects the problem about 75% of the time, but there are times when that does not work after one power-cycle (a heat problem? the unit is not super-hot when he does this)

    There's no _active_ switching componentry at the S-vid level, right? It's not scaling or doing any line-interpolation, so it seems more like a hardware than a firmware issue.

    Has anyone else noticed this?

    It's a US model.

    At this point he's ready to throw it back at the dealer and go a completely different direction, but I'm sure we're overlooking something.

    It's not any one component that can be at fault. In fact, when it happened the first time, he even replaced his DVD player (he needed a new one anyway, so it was a perfect excuse :D ) The fact that none of video signals pass through and it was corrected by replacing the unit certainly points me at the Denon.

    Thoughts?

    Kuyper

     
  2. Eddy Boy

    Eddy Boy
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    Whats the space and air flow around it. If it is getting hot is it OK once it has cooled down? Have you tried re-setting it by the front panel?
     
  3. kuyper

    kuyper
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    space and air-flow are great - Receiver is alone on a shelf (no stacked components) with plenty of space behind and above.

    Not sure what you mean by "re-setting it by the front panel" though?

    He has used the front power switch to powercycle (not yoinking the cord)

    I have suggested he try a line conditioner as a first step. Lame-assed salesman suspected a speaker-cable short :) The one thing that doesn't cut out is the audio! :)

    So much for "tech support" eh? :)

    Kuyper
     
  4. kuyper

    kuyper
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    On a whim I suggested that he may be experiencing some power spiking, resulting in a weird state being invoked (it was the second model of the same receiver, after all) and discovered that he was running through a simple 5-way power-strip with no spike protection or any conditioning.

    $90 later on a middle-of-the-road surge protector he's not seen a recurrence in over 72 hours of trials.

    So it seems his Rotel had a much more stable power supply (no surprise really :) ) and the Denon seems to be somewhat picky.

    Regardless, it does re-emphasize that amps (and A/V equipment in general) are all dependent on one thing: to produce clean signals they need clean power - GiGo (Garbage in, Garbage out) so remember to save a little on your budget for some power conditioners.

    Cheers
    Kuyper
     

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