The full color LED advertising lamp with a controller has only a faint light when it is energized. Why is that?
LED only a very weak light, indicating that the current flow through the LED is not enough, there are generally the following situations:1. the input voltage is not enough, or the output voltage of the power supply is not enough.2. LED current limiting resistor is too big or damaged.The transistor of the 3. switch LED is damaged or its control circuit is damaged.4. LED damage
The voltage is not enough, or is the LED wick attenuated
LED only a very weak light, indicating that the current flow through the LED is not enough, there are generally the following situations:1. the input voltage is not enough, or the output voltage of the power supply is not enough.2. LED current limiting resistor is too big or damaged.The transistor of the 3. switch LED is damaged or its control circuit is damaged.4. LED damage
