TX-NR509 Rear speaker

I seem to have lost sound on one of the rear speakers on my new TX-NR509 when using audio on the TV/CD setting. I know it can receive a signal because both rear speakers can be heard on "full mono" and in other mode settings, such as BD/DVD. Only "full mono" gets both back speakers heard on the TV/CD setting, however. Unfortunately, this is the setting I use for listening to music, so you want all your speakers to work for that. On "All Channel Stereo" only one of the two back speakers has sound on this setting.

Any ideas how to fix this? Thanks in advance for any help you might give.

In regards to your issue- it would possibly be more effective to contact our Product Support Dept for further assistance with this specific issue via our phone number and hours of operation below. We would like to speak with you and work to troubleshoot and resolve your issue, with you having access to your unit, as prompt as possible. Please contact our Product Support Dept for further assistance with this specific issue via our phone number and hours of operation (Monday- Friday 9am to 8pm EST/ Saturday- Sunday 10am to 4pm EST: (800) 229-1687; option #3 PRODUCT SUPPORT). We would like to speak with you and work to troubleshoot and resolve your issue as prompt as possible.

Thank You;

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