Because these boards are generic, official manufacturer websites do not exist. Instead, firmware is hosted on community repair forums and Telegram channels:
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How to fix TV main board with usb firmware update software guide Because these boards are generic
Open the downloaded .rar file and copy the .bin file to the root of a FAT32-formatted USB drive. Download RR8501 C816A 1366x768 rar
Often provides specific BIOS bin and USB firmware software for RR8501 boards .
Once the light stops flashing or changes color, remove the USB and restart the TV. Important Safety Information
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