TCL 4 Series User Guide

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12- and 6-digit codes

The USB update process uses a pair of codes to validate that you are authorized to

install an update, and to ensure you are not attempting to install an old, unsupported

version of the system software.

8. Using the TV remote control, select Next to move to the next screen, and then

use the on-screen keyboard to enter the 6-digit code. When finished, select OK.

The system update begins. Do not remove the USB flash drive until the TV

restarts.

When the update finishes, the TV restarts. You can check the new version number by

navigating to Settings > System > About.

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