The receiver shuts itself, the red light blinks

Sounds like it just needs a new lamp.
The way to tell is the lights in front:
green blinking as TV reboots = bad lamp
red three blinks = door switch
red four blinks = bad fan
6 or 9 blinks = bad thermal fuse

I’m happy to help further over the phone at https://www.6ya.com/expert/eric_ab7c09ec01841771

When one light from the four lights ring itself changes from green to red, it means that a general hardware failure has occurred or is imminent. Blinking of one red light with an error message like E66, E67, E68, E71, E74 or E77 means a repairable problem while the one red light blinking without error message means some critical or irrepairable problem. The problem can be avoided by restarting the Xbox 360 console but if you have not received any error message with one blinking red light then the problem is irrepairable. The console will behave the same way and you should understand that one or more of the hardware components in your console have stopped functioning due to hardware failure. If you receive an error message with one red light blinking then the problem is reparable and the system will definitely start working. It means that there is some hardware problem with the Xbox 360 console connection occurring due to the misplacing of cables in the ports. Turn off your Xbox 360 and disconnect all cables, now reconnect the cables and switch on the Xbox hope this helps.

does it only shut off on high volume or a loud noise?

It's the amp tripping to protect itself.

look out for a shorting speaker wire or faulty speaker etc. disconnect each in turn to find out which

Is the projector receiving a source signal? if not it will power itself down after whatever time you have it set to do so when no signal is present.
Just an idea?

You goingto need to replce the powersupply inside www.partstore.com should have it or preorder it for you from the manufacture i think there around $150 they could be cheaper. Another option is Ebay. thanks for using fixa.com please rate.


Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

Did you recently move any speakers around or any items near the speaker wire connections?
It sounds like you may have a speaker wire shorting which is causing the receiver to go into "auto protect" mode. Check all of the speaker wire connections on the back of the receiver and at all of the speakers to make sure the wires are not touching or close enough to possibly touch.

the only way is by bringing to a tech.i think there is no need fro self-fixing with problems like this.try tapping the tv several times then turn it on.

i have the same problem

speaker terminal are short circuit,switch power off connect speaker properly then switch power back.
-the ventilation holes of the set are blocked-turn power off and make good ventilation around leave the set to cool and turn power back.
-the unit is operating at continuous high power turn it of and allow for cool down and switch it back.