Open the back of the TV to confirm the board model is exactly LDD.H510.B138 .
768M (as indicated by your file name) File Format: Split RAR archive (Part 03) Download & Resource Locations Download LDD H510 B138 3840x2160 768M Magic55 part03 rar
Typically installed via USB by placing the extracted .bin file on a FAT32 formatted drive and holding the power button while plugging the TV in. Open the back of the TV to confirm
Because this is a multi-part archive, you must download (Part 01, Part 02, etc.) into the same folder before extracting them. you must download (Part 01