Plug in the power cord while continuing to hold the button until the indicator light starts blinking, showing the update is in progress.
: Format a USB flash drive (8GB or smaller is recommended) to FAT32 .
The ".rar" file extension and "part09" designation indicate that this is the ninth segment of a larger, multi-part compressed archive. You must download (part01, part02, etc.) and keep them in the same folder to successfully extract the final firmware file, which is usually named allupgrade_v553_sos.bin or similar. How to Install the Firmware Download HV553 PC821 3840x2160 Ref60 part09 rar
: Typically runs on Smart Android platforms (often Android 7.0 or 11)
: Installing the incorrect firmware for your specific panel (even if the motherboard model matches) can result in a "flipped" or distorted image, or even "brick" the device. Always double-check your panel's model number before flashing. Plug in the power cord while continuing to
: Use a tool like WinRAR or 7-Zip to extract the first part of the archive; it will automatically pull data from all other parts.
: Move the extracted .bin file to the root directory of the USB drive (do not put it in a folder). Flash : Insert the USB into the TV's USB port. Hold down the Power button on the TV panel. You must download (part01, part02, etc
Wait for the process to complete (the TV will typically reboot). Where to Find Downloads