Not all transmitted channels by the cable or broadcast stations are in stereo:
Try checking several major network stations to be sure that the station you have selected is broadcasted in stereo.
TV may not be in stereo mode:
Press the SAP button on the remote repeatedly until Stereo appears.
If you are using coaxial cable for connection, you may need to use a set of composite cables instead.
This will improve sound and picture quality.
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