SOURCE: Onkyo TX-8522 stuck on standby
This is Not a real Fix, However it stops the problem!
Do not plug any power cords into the Receiver. I have found that using the "switched or unswitched" plugs in the back cause the trouble.
SOURCE: No sound from Left and Right front speakers
You didn't state it but I assume the other channels are functional?
The auxilliary channels are generally lower power and may even be serviced by a different voltage than the main amps.
If it is so designed, you may have something as simple as a blown fuse for the main amp supply.
If the aux. channels are equal in power, the power supply may still be dividing the load so a fuse still could be at fault.
The unit could also use integrated power amplifiers in which case, if two channels are operating from a single module it could be a module failure.
I don't see much chance of anyone repairing this system without examining it in the first person.
SOURCE: Onkyo TX-DS989 not staying on
This sounds like the action of some protection circuit that is monitoring some condition or voltage that isn't within its design limits. If it was mine, I'd look for an Onkyo forum to see if others have experienced the same problem.
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