After about 1 minute, the light will stop flashing and turn (or solid Green), signaling the upgrade is complete. Final Step : Power cycle the TV and perform a channel scan.
Use a USB flash drive (ideally 8GB or smaller) formatted to FAT32 . Rr52c.03a Firmware Download
Insert the USB drive into the TV’s USB port while the power is off. After about 1 minute, the light will stop
Turn on the power. The indicator LED will flash red and blue (or just red) for about one minute. After about 1 minute
Updating or installing the RR52C.03A firmware is a "blind" process because the screen will not display anything until the update is successful.
Here’s what I can offer to help you move forward: