Please check the picture settings on your cable box, particularly the aspect ratio settings, which will vary depending on the brand and model of your cable box and on your local cable provider. You may wish to consult with your cable provider for more information on how to adjust the cable box's settings. Some settings, such as a setting to force an analog channel's native 4:3 aspect ratio to 16:9 widescreen to fit your display, may interfere with the cable system's copy-protection feature and cause distortion.