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
This specific file is a firmware update part for the , which uses the LDD.H510.B138 main board and supports a 4K (3840x2160) resolution. Key Specifications Device Model: Magic 55H5500 Main Board: LDD.H510.B138 Resolution: 3840 x 2160 (4K UHD) 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. Typically installed via USB by placing the extracted
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.
A primary source for this specific firmware is KenotronTV , though it often requires registration or a paid subscription to download.