Outdated or corrupted GPU drivers are a hidden cause of many 4K playback failures. This is especially true if you are using an integrated GPU (like Intel UHD Graphics) or an older dedicated GPU.
To never search for another "4K fix" again, follow these guidelines: ipzz214 4k fix
Gently clean the exterior dome/lens with a microfiber cloth. Outdated or corrupted GPU drivers are a hidden
: Open your graphics control panel →right arrow navigate to Change Resolution →right arrow ipzz214 4k fix