Installing incorrect firmware can permanently "brick" your television. Always verify that the firmware matches your specific panel model (e.g., HV490QUB-N8A) and mainboard.
Firmware downloads for this board are usually sought to resolve the following issues: TV stuck on the logo or "bootlooping." Download MS6488E U801 3840x2160 TEMPO part07 rar
Power off the TV, insert the USB, and hold the power button while plugging the TV back in to trigger the auto-update. insert the USB
Download all required parts and extract them into a single file (often named CtvUpgrade.bin or similar). Download MS6488E U801 3840x2160 TEMPO part07 rar
Are you currently facing a on your TV, such as being stuck on the boot logo?
Copy the extracted file to the root directory of the USB drive.