1) Questions：All LEDs blink.

Answer：poor contact ；

Solution：Firmed or plug again in the unfixed point；

2) Questions：LED weak；

Answers： 1、Opposition polarity of LED

2、Longer pins of LED；

3、Switch power is different from the voltage marks of LED;

Solutions:

1、Ensuring right connection of positive pole and negative pole;

2、Decreasing the connection of LED;

3、Making sure switch power as same as the voltage marks of LED.

3) Question：Some LEDs are black；

Answers： 1、Check whether connection direction is right；

2、Check whether power supply output cable is corrector；

3、Check whether plug way of power supply is opposite.

Solutions： 1、Plug it in the correct direction;

2、Make sure the red line with the positive pole, black line with the negative pole；

3、Finding some part opposition line and connect them again.；

4) Question：All LEDs are off.；

Answers：1、No power output from the power supply；

2、The power supply cable output is right or not;

 Solutions:  1、Assembling power plugged it into switch power input port;

    2、Check the pole of power supply is right.

5) Question：Green LED in sending card doesn’t not glitter；

Answers：DVI cable is not plugged tightly

Solutions: Plug the DVI cable tightly.