My rx-v2400 also shuts off soon after turning it on. Problem started 3 months ago. I've checked speaker connections, sent the unit to be repaired (3x), tried to get help from Yamaha. Bottom line...after $350 in repairs and endless frustrations, I've decided to buy a new receiver (not Yamaha).
Seems like you have a shorted output channel, remove all your speaker connections and try again, if the problem persist, good chances are that you need to replace a couple of power transistors, let me know if you need more help, I've fixed some Yamaha amplifiers with this problem
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It indicates an output load problem, dis-connect the speaker wires from the back of receiver. Next power on and turn the volume right down, if the unit runs, check for shorts in the speaker wires and speakers. But if it still shuts down "with speakers and wires dis-connected" one or more of the audio output ic's is shorted and will need a professional to assess the item.
those are fused internally and made to power small items.the unswitched are constant power and the switched goes on and off with the power on the reciever.you have hooked it up to something that draws way to much power and more than likely blew the fuses.check the back by the sockets,they are rarely over 250 watts max.
unplug the reciever for at least 15 minutes. then replug in all of your speakers making sure there is no bare wire showing. if the reciever doesnt ower on replace the fuse inside(make sure unplugged from wall)
When it shuts off, does it display anything on the front like "ck speakers" you could have a shorted wire or bad speaker. Sounds more likely than a bad receiver. Yamaha is pretty bulletproof in "self preservation" circuitry! about the only thing that takes them out is lightning and major power surges. I have been selling and installing Yamaha receivers since 1995 and have only ever seen one with a problem that was unrelated to power. and I've done hundreds. If your not using HDMI, and the Video portion of the receiver, I would definately keep the unit $ 1500.00 is no cheap receiver. Try disconnecting the speakers, then turn on the unit with a source connected like cable/sat/fios on then crank the vol and let it set, if it cuts out, yes you've got a problem internally, however, I would stronly suggest metering all of the speakers and wires for shorts. There is an internal fuse as well right near the power cord, you have to pop the top to get to it, If you have a multimeter check the fuse with resistance tone. If you get tone, you have a good fuse if not If you need to replace it. They can be found at Radio Shack etc. If the fuse is OK, chances are you've got bad transistor(s) and needs to go to service. Repair should be under 200, well worth it. If you have further questions, post a comment and I will get back to you ASAP. Hope this helps