: Visit the Hisense USA Firmware Download or Hisense Canada Support sites. You will usually need to enter your TV's serial number to ensure you get the exact matching software.
: Use a tool like WinRAR or 7-Zip to extract "part1.rar." This will automatically combine all parts (including part10) into a single upgrade file, typically named something like upgrade_loader.pkg . Download RSAG7 820 5819 Hisense 55K390 part10 rar
, it is highly recommended to use official sources rather than third-party .rar files to avoid bricking your TV: : Visit the Hisense USA Firmware Download or
and related models. These files are typically split into multiple parts (like part1 to part10) to make large firmware downloads easier to manage. How to Get the Firmware For older models like the , it is highly recommended to use official
Once you have all the parts of the firmware, follow these steps to install it via USB:
The file likely contains a portion of the firmware for the RSAG7.820.5819 main board , which is used in the Hisense 55K390