: If possible, use a programmer (like the RT809F or CH341A) to save your current firmware before flashing a new one.
: Ensure your screen panel is actually 1366x768 . If you use this file on a 1920x1080 panel, the display will be distorted or blank. Download ATM20 PB819 1366x768 REF35 rar
Finding these .rar files usually requires visiting specialized technician forums or firmware databases. Because these files are hardware-specific, (make it unusable). Common Sources for LED TV Firmware: Kazmi Elecom : A popular site for universal board software. : If possible, use a programmer (like the