Power on the TV. The indicator LED will usually start flashing (red/blue), signaling the update is in progress.
You can find the RR8501 USB Firmware on technical forums like Lab-One Forum , which often hosts community-contributed BIOS and USB firmware files. Installation Guide Download RR8501 C031A V60 1024x768 USB rar
1024x768 (standard for many 15"–19" LCD panels) Power on the TV