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Does the receiver work OK? These are probably electromechanical switches (called relays) which yamaha uses a lot. They use electricity to connect/disconnect something by magnetic force and this causes the "clicks". It is used for example to connect the speakers to the output of apmlifier only after it has finished initializing to protect both the amp and the speakers. When I turn on my RX-V465 I hear at least one click, it is probably connecting power to the amp. When turning it on with Radio button on remote I hear 3 clicks over 2-3 seconds. So these clicks are normal and nothing to worry about. They occur also when you switch to the PURE DIRECT mode.
When the unit functions correctly, you should hear 2 clicks. The first is the power relay that "starts" the unit. The second is the speaker protection relay that will kick in the speaker connection. If you do not hear the second click, the unit is in protect mode. This means that a problem was detected in the amp section and the unit is prevented from connecting the speakers. This is done to prevent further damage. Typically the output transistors fail and cause this. Expect a parts cost in the $25-$50 range for this repair.
Unplug all the speaker wires first, then unplug the unit from the wall for at least 24 hours, The plug back in without the speaker wires or anything else plugged in. Then see if it goes to the protection mode. If it does not, plug in each speaker at a time, and see if any speaker, when hooked up, makes the receiver shut down. If it does shut down, My friend, I'm afraid you will need to take this unit into a repair shop, OR get a new unit. Good Luck
This maybe an easy one. Have you unhooked all the wires going in to the stereo. "SP wires" means you have wires to the speakers are touching and the stereo is shutting down to avoid overloading. Hope this helps...
The problem might be caused by two major circumstances. 1)Touching wires
2)Overheating. I suggest you unplug all wires connected to the amp then turn on the amp. If it gets turned on then we know that the problem is that you have touching wires. If there is a short circuit somewhere, get rid of it. The ventilation is another important issue that you have to pay attention. It simply causes overheating.