I have an onkyo htr500. When I power it on it makes a clicking sound and then shuts off after 4-5 seconds. I have checked the fuses and they are fine. I have tried to plug and unplug it and the speakers but nothing simple seems to help. Can you help?
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disconnect all speakers and inputs and try again. If it stays on, you have a short in one of the connections. Try adding them one at a time and see if it shuts off. If it overloads with nothing connected, you have an internal problem.
May I ask how many watts can your reciever handle ? And how many watts does your speakers need in order to be powered up (input). The two speakers you have installed might be too powerful for your reciever to handle. You might have to down grade to less powered speakers. All in all you have an excellent product there good choice...
Activated protection circuitry means that the amplifier is seeing conditions it does not like and is shutting down the power to prevent further damage. Either you have a short in your speaker wires, in your speakers, or a blown amplifier. Disconnect both speakers and turn on the amplifier. Does it still give the error message? If it does, your amp is blown. If it does not, carefully inspect your speaker wires and their connection. Make sure all looks good and reconnect the speakers and try it again. Still get the error message? You likely have a problem in your speaker cabinet(s).
The manual suggests disconnecting inputs and outputs and power, letting it sit for an hour, then plugging it back in and turning volume to max to see if it still shuts off. If it does, the problem is with the unit. If it doesn't, the problem is elsewhere.
Judging from some other sites, this is a common problem. If you take it to a dealer, suggest they check the AC input. Before anything else, make sure that there are no stray wires on your speakers connecting the positive and negative clips, which will cause a short and activate the amp protection.
I had the same problem with an Onky502 and replaced it today with an Onkyo606. It worked fine for an hour then started shutting off automatically. I'm following the manual and letting it cool off now for an hour, and meantime I'll check my speakers.