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 firmware update, as this can permanently damage the main board. Download RSAG7 820 5819 Hisense 55K390 part10 rar
: Format a USB stick to FAT32 . Copy the extracted firmware file directly to the root of the drive (do not put it in a folder). Initiate Update : The file likely contains a portion of the
Hold the on the remote while plugging the TV back in. Continue holding until the "Software Updating" message appears. Initiate Update : Hold the on the remote
Wait for the process to complete (usually 5-15 minutes). The TV will reboot automatically.
: 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 .
Power off the TV and insert the USB into a .