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Your result indicates the unit is not passing its power up self test. The first thing to try would be to remove all connections to the unit and try to power up. If it still mis-behaves, the unit has an internal problem best left to pros unless you're pretty good digging through circuitry. If it comes up stable, then reconnect things one at a time until the issue occurs again. Detach the offending connection and look for issues in the cables or the connected unit.
While working it stops and flashes red approximately
2 seconds interval Causes Protection circuit is activated
depending on the temperature of the surroundings Remedy Switch off the power supply and power on
after the temperature have reduced. While working it stops and flashes red approximately
0.5 seconds interval Causes 1.Using speakers having less impedance
than the specified. 2.If speaker core wire touch each other Protection
circuit is activated Even applying power red flashes 0.5
seconds interval Cause Amplifier circuit has failed Remedy Switch off the power and contact denon
these a couple things you can try to reset,if resetting dont work you will have a amp problem.Try pushing and holding down these 3 buttons s.speaker b and att and exit buttons for at least 3 sec or more.should reset.If not also try pushing and holding down mult speaker and exit and att buttons together for at least 3 or more seconds.if still shuts down you will have shorted transistors inside of unit.
This is a short or unstable ohm load. Remove all speaker wire connections to see if the amp will stay on.
If the problem goes away when disconnecting the speaker wires try this:
1) Check volume level on zone one and zone 2 if connected. If it is too high the amp will go into protect mode and shut off exactly as you described.
2) Make sure no wires are touching any other wire or the metal surface of the amp. This will cause a short and send the amp into protect mode.
Is the red light flashing at first?
The unit may be going into protect mode. Lets hope it has done the job and the receiver has protected itself from failure. Protect mode can result from speaker wires touching each other or the Amps metal case. Check that first. It can also be caused by unstable ohm loads if too many speakers are connected to any of the outputs especially zone 2. If you can remove all speaker wires and turn the unit back on. If it stays on, turn the volume down on the main zone and zone 2 if connected. Then reconnect speaker wires.
Receiver turns on Green but on pressing button again for red light standby, red light will not come on for this Denon receiver. Recently light came on saying Panel Lock is on. I was not able to get tuner to work.