Hktrt2843p639 Firmware Link -

The is a common LED TV "Main Board" (or motherboard) found in various budget and smart TV brands, including Skyline , Supra, and Telefunken . Updating or reinstalling the firmware for this board is a critical task if your TV is stuck on the boot logo, experiencing software glitches, or requires a panel resolution change after a board replacement. Where to Find the HK.T.RT2843P639 Firmware Link

Do not turn off the TV until it restarts automatically. The first boot may take up to 10 minutes. Troubleshooting Common Issues hktrt2843p639 firmware link