Question about Onkyo HTR500 Receiver
When i push power button the receiver turns on.then immediately turns off
I had this problem also and discovered an easy way to trick it into powering on: Click the power button, then within 1 second of the receiver powering off, click the power button again. The receiver should stay on this time. This works with both the button on the receiver and the remote control.
I would like to know what causes this problem and whether or not I should be concerned about damage being done. I assume this is a power protection. I haven't tried plugging this receiver into a different power socket to test, but I don't think the power plug is the problem. Note: I have the subwoofer plugged into the power plug on the back of the receiver.
Posted on Feb 27, 2010
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Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.
Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.
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