My son was hitting buttons on my Onkyo TX-SV545 and now the front right & left speakers are not functioning. The center speaker, subwoofer and surround speakers are all working. I'm not sure how to fix it.
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Try swapping the connectors for front-left and front-right (just swap right at the back of the amp)
After the swap, does the front-left speaker work, and now the front-right is dead? If so, then it's a problem in the amp. If not, then the problem is in the wiring and/or the front-left speaker itself.
Post back here with your findings, and we'll troubleshoot whichever part of the system is broken.
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.
If you have a VCR it is easy. Just plug RCA cables into audio out right and audio out left (on VCR) and other ends into VCR audio in right and left at rear of your receiver. If there are two sets of video audio inputs, push button on front of receiver to agree with where you plugged cables in. (ie. Video 1 and video 2)