Keep holding until you see a "Software Upgrading" progress bar on the screen. during this time.
: Use a USB drive (ideally 4GB to 16GB). Right-click the drive in "This PC," select Format , and choose FAT32 as the file system. Download CV538H 3840x2160 Myros LINXIA part01 rar
Since the firmware is often distributed in multi-part archives (e.g., part01.rar ), you must download all parts to the same folder on your PC before extraction. Keep holding until you see a "Software Upgrading"
: Ensure you have part01.rar , part02.rar , etc. The extraction will fail if any part is missing. Right-click the drive in "This PC," select Format
: Ensure your TV is indeed 3840x2160 . Installing 4K firmware on a Full HD (1080p) board can cause a permanent black screen or "flipped" display.
There are two common ways to initiate the update depending on whether your TV can still boot into the menu.