You can typically find these files on dedicated LED TV repair forums or technical communities:
This is a popular "three-in-one" board that integrates the main processor, power supply, and backlight driver. Download CV358H B42 1366X768 NATH part04 rar
Use a tool like or 7-Zip to "Extract Here" on the first part (Part 01); it will automatically pull data from Part 04 to complete the extraction. Copy the resulting .bin file to a formatted USB drive. You can typically find these files on dedicated