The TV should enter an "Update" mode, often indicated by a blinking status LED or an on-screen progress bar.
Designed for screens ranging from 32 to 55 inches from manufacturers like Samsung, LG, and BOE. Understanding the Firmware File The TV should enter an "Update" mode, often
Hold the physical power button on the TV and plug it back into the power source. The TV should enter an "Update" mode, often
Professional installation is recommended as the board requires specific programming to match the resolution of your exact TV panel model. The TV should enter an "Update" mode, often
Source: https://mcpress.media-commons.org/complextelevision/all-comments/