: Never turn off the power during a firmware update, as this can permanently damage the main board.
: 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
The file likely contains a portion of the firmware for the RSAG7.820.5819 main board , which is used in the Hisense 55K390 : Never turn off the power during a