Mr.
My Onkyo HT-R990 suddenly shut down during two hrs. Operation at 90% volume. When i tried to switch on again, message affair on screen in very few second "CHECK SPEAKER" then shutting off again automatically. I removed all speaker wires connected to the receiver and switch on again, but the same message affair on screen. Any idea, would be the problem of the unit? please let me know. Thank you.
Dec 12, 2017