Question about Denon AVR-4800 Receiver

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No home theater sound

It appears that there is no home theater sound when the house system sound is on. I know the connections work because at times the home theater system works beautifully. The system switches between components for the home system. I reinitialized and reset, but, no change. It doesn't matter whether it is analog or digital, there is still no sound from the home theater.
I am using a heavy duty surge protector and battery back up and a fan so I don't think it is overheating. Besides this can happen immediately after the home theater comes on with the receiver. In the past, the home theater can just "pop on" after the system has been setting.
The sound is so good, I hate to start over with a new receiver.

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  • sross455 May 05, 2009

    The unit powers up just fine. It doesn't power down when switched between sources, but the sound goes away. I appreciate the thoughts, but I don't think they apply. Thanks

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  • Denon Master
  • 19,396 Answers

Protect mode will kick in whenever a fault is detected.

You get the unit not powering up, and sometimes you hear a clicking noise, that is the protection switch that keeps shutting down the unit.

Causes that can start protect mode are:

Electrostatic harges on internal circuits.
Leave the unit unplugged for power for one hour or so, this will allow discharge.

Bad speaker wiring.
Check speaker wiring, try unplugging and plugging back, or start after removing one speaker at the time.

Internal fault.
Internal fault is the natural cause for protect mode. If all the above did not work, then the problem is a blown component or an internal fault. In this case the unit must be taken apart , tested and repaired by an experienced person.
If the unit is less than one year old, or if you want to get service, call Sony at the phone number listed on the product documentation.

Regards.

Posted on May 04, 2009

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