Once you have all the parts of the firmware, follow these steps to install it via USB:
: Never turn off the power during a firmware update, as this can permanently damage the main board. Download RSAG7 820 5819 Hisense 55K390 part10 rar
Wait for the process to complete (usually 5-15 minutes). The TV will reboot automatically. Once you have all the parts of the
: 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
, it is highly recommended to use official sources rather than third-party .rar files to avoid bricking your TV: