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Denon AVR-1912 Front Left output stopped working

Confused

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The Front Left output of my Denon AVR-1912 suddenly stopped working. Only a soft rumbling noise can be heard. I suspect my experiment with a B&O Beolab 4000 has something to do with it. I stripped one end of an old RCA cable and connected it to the FL output of the Denon and the RCA to the Beolab 4000. Is it possible that a short circuit killed the FL output?
 

MaxwellsEq

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The Front Left output of my Denon AVR-1912 suddenly stopped working. Only a soft rumbling noise can be heard. I suspect my experiment with a B&O Beolab 4000 has something to do with it. I stripped one end of an old RCA cable and connected it to the FL output of the Denon and the RCA to the Beolab 4000. Is it possible that a short circuit killed the FL output?
It's hard to be certain without putting on a bench, but from your description of what you were doing, yes I suspect you shorted the amplifier.
 
OP
C

Confused

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It's hard to be certain without putting on a bench, but from your description of what you were doing, yes I suspect you shorted the amplifier.
Thank you for your diagnose or thoughts of what might have happened. I stripped a large part of the cable, maybe 3-4 cm. And I connected it while another speaker was already connected to this FL output. I thought as long as I don't feel electricity myself it couldn't harm the amplifier.
Is there a way to test if the FL output it is really broken? Can it be repaired?
 
OP
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It appears that you connected the Left Front speaker output to a line level input on the B&O speaker. There is also a chance that you damaged the speaker during your experiment.
After disconnecting the Beolab 4000 everything was still working fine. I left the stripped cable (with disconnected RCA plug) attached to the amplifier because it's not easy to connect. Everything worked fine for days and then suddenly one speaker quit. Maybe the stripped part of the still attached cable touched another stripped part?
 

Roland68

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The Front Left output of my Denon AVR-1912 suddenly stopped working. Only a soft rumbling noise can be heard. I suspect my experiment with a B&O Beolab 4000 has something to do with it. I stripped one end of an old RCA cable and connected it to the FL output of the Denon and the RCA to the Beolab 4000. Is it possible that a short circuit killed the FL output?
You should also have the Beolab 4000 speaker checked before connecting it anywhere. This is an active speaker that can only be connected to a preamplifier output.
You shouldn't connect two speakers in parallel without experience and background knowledge.
Please have the amplifier checked by a specialist workshop, otherwise there could be further defects, for example in your speakers.
In the future, please ask before connecting anything that is not described in the manual, especially if it requires DIY cables. A lot, and even everything, can break without you "feeling" the current, apart from your life.
 
OP
C

Confused

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You should also have the Beolab 4000 speaker checked before connecting it anywhere. This is an active speaker that can only be connected to a preamplifier output.
You shouldn't connect two speakers in parallel without experience and background knowledge.
Please have the amplifier checked by a specialist workshop, otherwise there could be further defects, for example in your speakers.
In the future, please ask before connecting anything that is not described in the manual, especially if it requires DIY cables. A lot, and even everything, can break without you "feeling" the current, apart from your life.
Thank you for your advice, yes it was a rather adventurous exercise.
 

bothu

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Thank you for your diagnose or thoughts of what might have happened. I stripped a large part of the cable, maybe 3-4 cm. And I connected it while another speaker was already connected to this FL output. I thought as long as I don't feel electricity myself it couldn't harm the amplifier.
Is there a way to test if the FL output it is really broken? Can it be repaired?
Have you tried to disconnect the amp from the main outlet.
Is there any reset option of your amp ?
If it is the low level RCA output you have shorted I am nearly sure that the low level output can stand a short.
 
OP
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Confused

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Have you tried to disconnect the amp from the main outlet.
Is there any reset option of your amp ?
If it is the low level RCA output you have shorted I am nearly sure that the low level output can stand a short.
Yes! Disconnecting from main outlet did not fix the issue, but a reset of the microprocessor did (picture attached). Thank you so much!
 

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