Question about Onkyo TX-DS777

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When I turn on my AV Receiver HT-R520 it shuts down after a few seconds and the standby red light flashes???

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Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; 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 and competent hands-on tech.

Posted on Mar 27, 2011

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1 Answer

My onkyo HT RC330 will not power up at all. Have had problems past couple of months with starting it but if you played around with swith it would start. Now nothing.


Try resetting the AV receiver To reset the AV receiver to its factory defaults, turn it on and, while holding down VCR/DVR, press 8 ON/STANDBY. "Clear" will appear on the display and the AV receiver will enter Standby mode.

It is possible that the protection circuitry has been activated. Remove the power cord from the wall.. Disconnect all speaker cables and input sources, and then leave the AV receiver with its power cord disconnected for 1 hour. After that, reconnect only the power cord and set the volume to maximum. If the AV receiver stays on, set then the volume to minimum, disconnect the power cord, and reconnect your speakers and input sources. If the AV receiver turns off when you set the volume to maximum, disconnect the power cord, and contact your dealer.

If the standby light is lit it and the unit will not boot it is most likely that the protection circuit has been activated. If there is no standby light then check the fuses. These units check that the power supplies are operating near specification. If a capacitor or resistor in the circuit, or a broken solder connection the unit will shut down. Because of the temperature the thermal cycling around the power supplies a broken solder joint can occur. This will make for an intermittent operation.

Hope this helps.
26289825-owoa52fq3dbvw0lom3ojbzgr-3-0.jpg Failed resistor or capacitor


26289825-owoa52fq3dbvw0lom3ojbzgr-3-2.jpg

26289825-owoa52fq3dbvw0lom3ojbzgr-3-5.jpg

Sep 23, 2016 | Onkyo Ht-rc330 5.1-channel Home Theater...

1 Answer

Onkyo ht-rc180 standby light blinks will not start.i tryed factory reset, still blinks


The amp protection circuit has been activated. Remove the power cord from the wall outlet immediately. Disconnect all speaker cables and input sources, and leave the AV receiver with its power cord disconnected for 1 hour. After that, reconnect the power cord and reconnect an input and a pair of speaker wires onto the unit. If the receiver still does not turn on than you will have to bring it in for service. Turn up the volume and if the receiver doesn't shut down, power off the receiver and add another pair of speakers. Power up the unit again and turn up the volume. If it doesn't shut down, power off the unit again. Now connect all your input sources and turn on your receiver. If the unit shuts down again, your unit will need to be further serviced at an authorized Onkyo service center.

Sep 24, 2014 | Onkyo Ht-Rc180 7.2-Channel A/V Surround...

1 Answer

I CAN'T GET MY ONKYO HT-R340 AV RECEIVER TO TURN ON, IT WAS WORKING FINE , STANDBY LIGHT IS ON BUT DOES NOT TURN ON. ANY SUGGESTIONS?


I have the same problem during years, I have the same av rereiver and the device switchOff (even in standby). The red led is not visible. During several hours, rare time minutes it is blocked.
I sent it, the last year to the official technical service and they said me that nothing matter with it!!!

The worst buy made by me, goodluck, if you have solution I will be pleasure of your information

Juan Luis Santiago

Sep 09, 2010 | Onkyo HTR500 Receiver

1 Answer

My receiver will not turn on and the red standby light flashes. What is wrong?


Flashing standby light shows that protection mode is activated in receiver because of some problem in output amplifier section.
Please check output amplifier section and replace defective component to fix the issue.

Jun 17, 2010 | Aiwa AV-DV75

1 Answer

Have ajustments all screwed up


If you can’t resolve the issue yourself, try resetting
the AV receiver before contacting your Onkyo dealer.
To reset the AV receiver to its factory defaults,
turn it on and, while holding down the [VCR/DVR]
button, press the [ON/STANDBY] button. “Clear”
will appear on the display and the AV receiver will
enter Standby mode.
Note that resetting the AV receiver will delete your
radio presets and custom settings.

Feb 10, 2010 | Onkyo HT-S9100THX 7.1 Channel Receiver and...

1 Answer

My Onkyo HT-R510 will shut down after several


Might be over heating. Make sure you don't have anything sitting directly on top of it. I even put a little fan blowing outward at the back of my system to keep it cool.

Dec 04, 2009 | Onkyo TX-SR501 Receiver

1 Answer

Onkyo ht-r500 no speakers attached goes directly into protect mode, standby light blinking..


I have a HT-R520 - First thing stated in the manual is 'Do Not Apply Power to the System Until All the Speakers Are Connected to the Receiver.' This practice avoids any hot connects to the speakers. As with any high-outpiut system connecting spreaker wires to the system while in operation can spike the speakers as well as the amplifier curcuits. Hook up your speakers first and give it a try. Good Luck!

Jul 14, 2009 | Onkyo HTR500 Receiver

1 Answer

Brand new avr588 receiver is turned on....is on for five seconds and then cuts off to standby


Hi donnie025,

I can't believe you haven't received an answer before now.

The red flashing light normally indicates that the protection circuit has been tripped. It can be caused by something as simple as a short in a speaker wire. Even if there is one strand of loose wire that makes contact with the back of the receiver, another wire, etc. it can cause a short. To protect itself the receiver will simply shut down.

1st. I would suggest disconnecting all the speaker wires from the back of the receiver. Then turn on the receiver (obviously you won't hear any sound) and see if the receiver does the same thing. If it does you should try disconnecting all of the source components (DVD player, Cable box etc.) and try again. If it still does it the receiver is bad and needs to be serviced or exchanged if you still can.

2nd. If the receiver stays on after you disconnect, then turn off the receiver and connect one speaker at a time, then power on the receiver at test it after connecting each speaker. This way if it suddenly shuts down after connecting a speaker you know which speaker or wire to check.

Let me know how it works out for you, I hope this helps if you haven't figured it out already.
Matt @ OneCall
www.onecall.com
twitter.com/onecalldotcom

Nov 08, 2008 | Denon AVR588 Receiver

1 Answer

Onkyo receiver (HT-R430) cutting out after a few seconds


This problem is related totally to the remote control.Pres the CRL button rapidly during that 3 sec interval and get the nunmber down

Nov 12, 2007 | Onkyo HT-S680 System

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