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Hi Hurk, Power reset the AV receiver, simply unplug the unit and wait 1-2 minutes then plug the device back in and power on. If that doesn't work, perform auto-calibration and try again. Here's the link on how to. https://helpguide.sony.net/ha/strdh79/v1/en/contents/TP0001559209.html?search=calibration Happy to help, David
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