A:Answer Hi! Usually the TV shows the highest resolution available. If you can only see the signal at 720p, it is highly probable that the resolution needs to be adjusted on the device that is sending the signal (cable box, DVD player, Xbox, among others). If you would like more information and for us to check your connections, please contact us on the link below and we will gladly assist you. Viridiana E. Insignia Support. https://www.insigniaproducts.com/contact-us