Make sure you have a 4K compatible TV and streaming device.
Ensure that your cables support HDMI 2.0 with HDCP 2.2 and is 4K compatible.
Check that your cable is plugged into the right HDMI port of your TV.
If you’re using a device such as a Fire TV, Apple TV or Google TV, make sure the version you have is 4K compatible at 60 frames per second. If you’re watching with DIRECTV, fuboTV or Verizon Fios, make sure you have a 4K subscription and a 4K streaming device.
Check that your internet connection supports a (minimum 50 mbps download)