Problem Description:Power switch is on; controller light is on; display meter is not on.
Reason Analysis:
1)Check if the communication cables from the controller to the display are loose and the pins are bent
2)When the pins of communication cables and interface are normal, the display still does not light up.
Solutions:
1)Turn the interface pins of communication cables straight and tight.
2)Replace the display
Problem Description:Power switch is on, controller light is not on, display meter is not on.
Reason Analysis:
1)Check whether the light of the power switch connected to the controller is loose and falling off.
2)The controller light does not turn on even though the communication lines are connected properly.
Solutions:
1)Plug the communication cable of the power switch connected to the controller tightly
2)Replace controller