: Once it hits 100%, the TV should reboot automatically. Do not unplug the power during this process, as it can permanently damage the mainboard. Where to Find the Files?
When your TV is unresponsive, a standard System Update via the menu isn't an option. Instead, you need to "flash" the firmware using a USB drive. Download 35017861 1920x1080 Konka KDL55XS715AN part4 rar
Wait for a progress bar or "Software Updating" screen to appear, then release the button. : Once it hits 100%, the TV should reboot automatically