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Assistance on Denon AVR X3400H

DEcosse

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Sep 4, 2021
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I have a x3400H - it had been working perfectly and all of a sudden, in middle of a stream. ALL the audio went out - video remained intact, but in mid-sentence all audio just went out completely
I tried other inputs, incl tuner and still nothing; also a firmware update (to see if it would reset some aspects without losing all my settings)
Went to the speaker test tone and got nothing on the first one (left front) - nor would it change the level value, or be able to select the other speakers; it would go 'back' but when tried again, same thing, stalls on the first speaker without allowing any changes to the value or ability to select other speakers.
Ultimately I tried a factory reset:
During Initialization it got to the speaker setup; when it started to test left speaker, the setup froze - I did not hear anything regardless, but it would not progress, NOR back from that point in the setup;
Did another re-initialization, got to same point and again re-froze
I re-initialized and this time skipped that part of the setup - proceeded to set everything else up
During the Internet setup it tries different preset audio links for sound - I got nothing audible on any of the 4 links tested
Then went back to manual speaker setup - again got the same issue as previous to reset - i.e. it stalls on the first speaker, no audio tone, cannot adjust that speaker level, nor change to another speaker, but will go 'back'

It seems like a hardware problem - not sure where to go from here?
Any advice appreciated - I can diagnose electronics, but not without a schematic - other than looking for obvious degraded components

Is there anyone with experience of Denon Receivers that can help point me in the right direction?
 
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