The protection circuitry of the unit has been triggered. normally it happens only if the unit receives a lot of electric current or if the receiver is maxed to its limitations (audiowise) but in rare cases the unit does not power on. what u need to do is send it in for service and if u happened to have opened the receiver. just dont tell onkyo that u did. just go to onkyousa.com look for the support tab and click on find dealer/service center adn then enter ur zip so u can check the nearest service center. you need a copy of your receipt though if ur looking into a warranty service. but if the unit is out of warranty, just call in and set an appointment.
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The only thing to test would be to disconnect all speaker wires at the receiver then turn it back on. If it still won't turn on, it's an internal power supply issue and will need service. If it turns on, post a comment and I can walk you thru further troubleshooting. Hope this helps
The standby light should be on. If it is not, then check the main fuse. WIth the unit unplugged, remmove hte top cover and check the fuse by the line cord. If that is ok, then you will need to check the primary winding on the standby transformer. That transformer has a thermal fuse internally located and that sometimes gets blown due to a power surge. If you do not have the equipment to test this, get a detailed estimate from a local servicer. The standby transformer usually costs arounf $25 or so.
man I think i have the same problem....
i push the power button but immediatly the LED turns off. I cheked the fuse but thats not the problem. Please if you solve your problem let me know...
my e.mail adress firstname.lastname@example.org
sorry if you dont undersatnd me in some parts..im not very good writting english haha sorry..
try powering the unit right down by disconnecting from the mains supply. fire up after 5 mins and see what happens. There is a separate transfomer for the standby supply(small red light) An internal fuse may have failed or the thermal fuse inside the transformer. If fuses blow as sson as you fire up = output transistors hay be short circuit.