I can provide more targeted help if you let me know: Is your TV stuck on the logo ? Do you have a black screen but have sound? (Technical forums like KenotronTV often use "123").
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. I can provide more targeted help if you
Updating TV firmware via USB is a high-risk procedure. If the process is interrupted, it can "brick" the TV (making it unbootable). Format a USB flash drive to FAT32 . Download CV538H 3840x2160 BBK 50LEX 6027 part02 rar