Hold the on the remote while plugging the TV back in. Continue holding until the "Software Updating" message appears.
: 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 : 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 Hold the on the remote while plugging the TV back in
Wait for the process to complete (usually 5-15 minutes). The TV will reboot automatically. Copy the extracted firmware file directly to the
: 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.
Once you have all the parts of the firmware, follow these steps to install it via USB:
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