Press and hold the Power Button on the TV (not the remote) while plugging the power cord back into the outlet.

Plug the USB drive into the TV's USB port (use USB 2.0 if available).

To download and use the firmware split into RAR parts (like part03.rar ), you must ensure you have all corresponding parts before attempting to extract or install them. This motherboard is a common 4K three-in-one smart board used in several Mitashi and Chinese-manufactured LED TVs. 1. Downloading and Extracting the Files

Place all downloaded RAR parts in the same folder on your computer.

Use a high-quality USB pen drive (8GB or 16GB is usually sufficient) and format it to FAT32 .

Release the power button when you see a "Software Updating" or "Do Not Power Off" screen.