Question about Audio Players & Recorders
I had my denon avr-789 setup and working and about 6 months later it turns itself off and when I turn it back on it pops and the red light starts to flash...
It's going into protection. Check your speaker wires at the receiver, make sure none of the braids from the + to - are touching. Then if you still have the problem, disconnect the wires at the speakers and test power. If your receiver still shuts down, disconnect the speaker wires at the receiver and test. If the problem persists, it is a problem in your receiver and it needs serviced. Hope this helps. If you need further help, post a comment and I will help you further.
Posted on Nov 19, 2009
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Posted on Jan 02, 2017
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Mar 10, 2014 | Denon Audio Players & Recorders
Jun 20, 2011 | Denon AVR-789 Receiver
Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.
Overloads can be from excessive periods of high output and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced hands-on tech.
Check for loose speaker connections as a root cause for intermittent shutdown.
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