Hold the or Reset button on the TV and plug it into a power source.

Once the flashing stops or changes pattern, disconnect the power, remove the USB drive, and restart the TV.

You can find similar technical resources and firmware dumps on professional repair forums like Kenotrontv or Monitor.net.ru .

While specific steps can vary by manufacturer, firmware for this board is typically installed via USB:

Part of a split RAR archive (indicated by part03.rar ). You will need all parts (e.g., part01, part02, etc.) to successfully extract the firmware binary file [User Query]. General Installation Instructions

Combine all RAR parts and extract the binary file (usually named something like allupgrade506_8GB_1GB_refXX.bin ) to the root directory of the USB drive. Initiate Update: Power off the TV. Insert the USB drive.