What does 'nosignal' mean on a car display screen?

[DeGarrett]

Car display screen 'nosignal' means 'no signal', indicating that the display is not receiving any signal from the main unit and therefore cannot show any content. The maintenance methods for car display screens are as follows: 1. Prevent static electricity: The control and drive circuits in the display module are low-voltage, low-power CMOS circuits, which are highly susceptible to damage from static electricity. Static electricity damage is irreversible, so extreme caution is necessary during operation, assembly, and usage to prevent static electricity. 2. Handle the protective film: A protective film is applied to the surface of the installed display to prevent contamination during assembly. This film should not be removed until the final assembly is complete to avoid soiling or damaging the display surface. 3. Add padding: It is recommended to place a padding of about 0.1 mm between the display module and the front panel. The panel should also remain flat to prevent distortion after assembly.