You must download all parts (part01, part02, etc.) into the same folder before extracting.
Using firmware for the wrong screen panel (even if the TV model is the same) can result in a mirrored or distorted image. Download CV538H 3840x2160 BBK 50LEX 6027 part02 rar
If you need to adjust screen parameters after an update, you can often access the service menu by pressing Source followed by 2580 or Menu followed by 1147 on the remote. You must download all parts (part01, part02, etc
