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
: 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
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
Power off the TV and insert the USB into a . Once you have all the parts of the
Wait for the process to complete (usually 5-15 minutes). The TV will reboot automatically.
: 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 : How to Get the Firmware For older models
Hold the on the remote while plugging the TV back in. Continue holding until the "Software Updating" message appears.