Green light flashing LED display does not work to send card is how to return a responsibility

Full color LED display screen not display properly, send CARDS of the green light will flash. So how do we determine problem and fix? One, a green light flashing LED display does not work, send a card: 1, screen without power supply; 2, line not connected well; 3, receiving card without power supply or power supply voltage is too low; 4, send CARDS bad; 5, signal transmission between equipment connection or defective ( Such as: function CARDS, repeater) ; Check screen elimination method: 1, 2, check the power supply is normal reconnect the cable 3, ensure that power supply dc output power supply in 5 - 5. 2 v4, replacement send card 5, check the connection or replacement card ( Repeater) Second, LED screen does not work, send a card to green light don't flicker reasons: 1, 2, DVI line not connected graphics attribute set incorrectly 3, software chose to close the screen power supply 4 did not put in place, send a card or send a card has problem elimination method: 1, check the DVI wire connector 2, to set up replication model 3, choice of software to open the LED screen power supply 4, send CARDS or replacement card