If you are using an HDMI cable – then connect it via HDMI first and select HDMI source.
– If SKCR2706BT-B shows no signal, then connect the Cable Box or Satellite box to another TV 1st and to call cable/satellite company to setup the output to 1080p
– Once the Cable Box or Satellite box is set to output to 1080p – it can then be used with the SKCR2706BT-B via AV signal source.
>> Please check and confirm if the service provider box resolution settings are set to 720P
>> Please call your service provider if needed – for assistance in changing the settings on your cable/satellite box to 720P