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I have a yamaha m65 power amp. the amp lights up but the red protection light stays on. no sound.

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The power amps are blown and need replacing, the protect circut is stopping any further dammage

Posted on Oct 06, 2008

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1 Answer

How do I reset the protection circuitry on Yamaha RX-A820?


press and hold the 'tone control' and 'info' buttons and press power. This will release the protect. The first thing that show on the display will be the protect code to tell you why it shut down. If it turns right back off, then you most likely have a short in the amp that will need to be repaired.

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switch off from wall. this is a protection safety thing you need to have it repaired if the power from the wall does not fix it.

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It means the its faulty and it has an intelligent fault detector that helps the equioment to protect on its own, a technician will help you diagnose the fault, check amp module(output ic/transistors)

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My yamaha rx-v473 wont turn on


disconnect all wires from behind unit, speakers, input, and then try to power it up ,
if problem persist then try to tighten screws on back panel of the unit,
may sound silly but if amp board does not have good ground connection it can do that , go in protect mode .


happened to me ...

Jan 26, 2013 | Yamaha RX-V473 A/V Receiver Black

1 Answer

Can not get surround sound to work


Your Protection System probaly come on for some reason,Sony Is Known for that problem, Check on your screen if a red lit warning Staying (protect) Is on.If there is, Try hiting the reciever on the sides or the top of the cover fairly hard when it is turned on, Some times this will work to turn the protect light back off, Sony is bad for there amps end recievers going into the protect mode,

Sep 19, 2012 | Sony STR-DG600 Receiver

1 Answer

Red light stays on nad 350 amp


all of the time or only when it's off?
if it comes on when it is off, it is your stand by light. this is normal.
If it is on when the receiver is on, it may indicate an option, or it may be a protect light.
If it is a protect light, check your wiring and ratings.

Feb 06, 2011 | Audio & Video Receivers

1 Answer

Unit only stays on for 4 seconds then turns itself off.


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.

Nov 21, 2009 | Denon AVR-1705 Receiver

1 Answer

After turning ON the power/standby switch, the unit(receiver) display comes ON (green light) then after approx.4-5 seconds the display goes OFF and the unit defaults back to the standby mode (red light). I...


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 Amps2_bing.gif metal case. Check that first.
It can also be caused by unstable ohm loads if too many speakers2_bing.gif 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.

Nov 16, 2009 | Denon AVR-485 Receiver

1 Answer

The volume knob is flashing red on my AX-SD1 amp..no sound.


Unplug the receiver, let it sit for a minute or two then plug it back in. It's either in "mute" or in Protection. Generally, Yamaha's will say "Ck. Spkrs" If it still has a problem, post a comment and I will look up some sources and help some more.

Aug 07, 2009 | Yamaha RX-V690 Receiver

1 Answer

Yamaha rv1000


ok yu problem has to be with the protection system before you burn it up it collapses to protect the whole system.....go direc to the thermal cut off devices on the main output and then to the power system......

Dec 27, 2007 | Yamaha RX-V1000 Receiver

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