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: The standby light should begin to blink rapidly, or a progress bar will appear on the screen. Do not turn off the power during this process, or you may "brick" the motherboard.

: Sites like Lab-One Inside often host "Bios Bin" and USB firmware for similar HK-series boards. : The standby light should begin to blink

: Databases such as lcd-ledtvfirmwares.tk aggregate software for various resolutions and board models. Installation Steps (USB Update) : Databases such as lcd-ledtvfirmwares

While holding the button, plug the TV back into the power outlet. Copy the raw file (often named allupgrade_

: Extract the downloaded firmware. Copy the raw file (often named allupgrade_...pkg or RT2831...bin ) to the root directory of the USB drive. Do not put it in a folder. Initiate Flashing : Turn off the TV and unplug it from power. Insert the USB drive into the TV's USB port.

: If the TV is stuck on the logo and firmware doesn't help, the issue may be a physical failure of the EMMC chip.

Press and on the TV panel (not the remote).