Please refer to the user guide for the viewing picture settings.
Still no change. Following may be the reasons:
Swap the existing cable with a “known-good” working cable.
Remove any HDMI switch boxes/repeaters and try connecting directly.
Restart the TV and external device in this order to force a new HDCP query from the external device. Sometimes the (connecting points – top left), Hot-plug detect scheme doesn’t work properly.
As a last resort, swap / flip the cable around. (Connect the side from the TV to the external device and side from the external device to the TV set). Sometimes the HDMI cable gives a defect that causes it to be directional.