Why is display on monitor OK and not on lcd screen?

The display on a monitor may work fine while an LCD screen does not due to differences in hardware compatibility, connection issues, or settings. Monitors often use different signal types or resolutions than those supported by the LCD screen. Additionally, the LCD screen could be experiencing a hardware failure, such as a damaged screen or malfunctioning components. It’s also possible that the LCD screen’s settings need adjustment or that the input source isn’t properly configured.