The LED display does not work, and the cause of the fault is determined and eliminated according to the flashing green light of the sending card.

1. The display does not work, the sending card flashes green (for retractable)

(1) Cause of failure:

1) The screen is not powered;

2) The network cable is not connected well;

3) The receiving card has no power supply or the power supply voltage is too low;

4) The sending card is broken;

5) The signal transmission intermediate device is connected or has a fault (such as: function card, fiber transceiver box);

 (2) Troubleshooting method:

1) Check that the screen power supply is normal;

2) Check and reconnect the network cable;

3) Ensure that the power supply DC output is powered at 5-5.2V;

4) Replace the sending card;

5) Check the connection or replace the function card (fiber transceiver box);

2. The display does not work, the sending card does not flash green.

(1) Cause of failure:

1) The DVI or HDMI cable is not connected;

2) The copy or expansion mode in the graphics control panel is not set;

3) The software chooses to turn off the large screen power supply;

4) The sending card is not inserted or there is a problem with the sending card;

(2) Troubleshooting method:

1) Check the DVI line connector;

2) Reset the copy mode;

3) The software chooses to turn on the large screen power supply;

4) Re-insert the sending card or replace the sending card;

This article is from HongDa Electronics Limited.