The specific "part1.rar" file indicates a split archive. You must download all parts (part1, part2, etc.) for the extraction to work.
: After a successful update, you may need to enter the Service Menu (usually Menu + 1147 or Source + 2580 ) to adjust panel settings or mirror the image if it appears upside down. Download HV320 PB801 1920x1080 M90 part1 rar
: Use WinRAR or 7-Zip to extract the .rar file. Right-click "part1.rar" and select "Extract Here." The specific "part1
: Firmware for this board is often shared via community links on Facebook or specialized Telegram channels. : Use WinRAR or 7-Zip to extract the
: Press and hold the Power button on the TV keypad (not the remote) while plugging the power cord back in.
: The indicator light (usually red/green) will start flashing rapidly. This means the software is being written to the EMMC.
: Use a high-quality USB 2.0 flash drive. Format it to FAT32 or NTFS (as specified by some technical guides).