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Nathan
Nathan, Engineer
Category: Home Theater-Stereo
Satisfied Customers: 20372
Experience:  Custom home theater installer. Authorized dealer top brands
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There is a loud thunderous pop, then sound goes out. Let it

Customer Question

There is a loud thunderous pop, then sound goes out. Let it rest a while, turn it back on and its fine for 15 mins then happens again.
JA: What's the make/model number of your stereo? How old is it?
Customer: Denton-AVR-E300
JA: What happened right before this popped up? What troubleshooting have you tried?
Customer: Nothing happened before, I've checked wire connections
JA: Anything else you want the theater expert to know before I connect you?
Customer: No
Submitted: 15 days ago.
Category: Home Theater-Stereo
Expert:  Nathan replied 15 days ago.

Hi, I'm Nathan.
Sorry to hear that you're having trouble, but I'll do my best to help you. Please give me a few moments to review your details here.

Expert:  Nathan replied 15 days ago.

Is the pop from the denon, or from the speakers?

Does it turn itself off, or does the display flash or the red light flash?

Customer: replied 15 days ago.
Pop is coming from speakers. Almost like a rolling thunder.
Customer: replied 15 days ago.
Sometimes it turns itself off, red light flash
Customer: replied 15 days ago.
Typically occurs after watching for 15-30 mins
Customer: replied 15 days ago.
Hello?
Expert:  Nathan replied 15 days ago.

My apologies for the delay. The site is not quite instant, but please try to send only a single response and allow me time to receive it and respond back; multiple messages can get lost in the queue and further delayed.

Expert:  Nathan replied 15 days ago.

Are you listening to very small speakers, or at high volumes?

Customer: replied 15 days ago.
Not small, not really at high volumes.
Expert:  Nathan replied 15 days ago.

Is the denon in an enclosed cabinet or shelf, or stacked with other components?

Customer: replied 15 days ago.
Somewhat enclosed. Not stacked
Customer: replied 15 days ago.
Been in same spot for 2 yrs
Expert:  Nathan replied 15 days ago.

I ask because this can be from overheating, since it has been a few years it would be a good idea to blow everything (side/top vents) out with compressed air and vacuum it thoroughly.

Beyond that, this indicates a hardware fault, meaning a short in a speaker or internally in the amplifier.

You can try a few fixes yourself. To begin, with the receiver powered off, disconnect all speakers and components. Try to turn it back on in Tuner (am/fm) mode and see if it will stay on (by itself, connected to nothing but power). If it does, power off and reconnect 1 speaker, then power on to test again. Continue this process until you isolate the speaker or component causing the problem, or until everything operates normally.

Let me know the results, or lack thereof, and I’ll advise further if needed.

Nathan

Customer: replied 15 days ago.
This will take some time
Expert:  Nathan replied 15 days ago.

Yes I realize it will take awhile, as it is a process of elimination. It is also possible it will be fixed in the process if there is just a stray wire somewhere that is shorting, and reconnecting them all can resolve that.

Customer: replied 15 days ago.
Ok I'll start the process
Expert:  Nathan replied 15 days ago.

Thanks, ***** ***** long as you need and get back in touch anytime.

Nathan

Customer: replied 15 days ago.
After doing that, each time with just 1 speaker attached, the sound would occur eventually and the sound would go out
Expert:  Nathan replied 14 days ago.

Thank you for checking, unfortunately that does then confirm an internal hardware defect.

This issue could be a manufacturing defect, but is also often caused by a power event (shock/surge, prolonged over/under voltage condition, etc).

There is no quick fix for this, it would require repairs to correct the problem, but this type of repair is typically not practical. It will cost as much or more to fix as it would to buy a brand new receiver with updated features and a fresh warranty.

Depending how you’d like to proceed here, I can help with finding a repair shop, or recommending replacement options. Just let me know.

Best regards, ***** ***** for the news,

Nathan