What is the common Troubleshooting for A LED Screen?

Problem

Description

Analysis

The whole displays don’t work.

1. Check the power connection of the screen.

(Use a multi-meter to check AC 180V~240V input power and DC 5V power supply)

A. Problem of the input AC power, please check AC line. B. If the receiving card is without power, please reconnect 5V DC or replace the power supply.

2. Problem of control system (usually refers to sending card or receiving card）

Please replace components of control system one by one to check which one is defective; or contact us to repair.

3. Wrong setting of graphic card

Check and reset the graphic card

4. The graphic card is damaged.

Replace the graphic card.

5.The computer turns into dormancy or screen-protecting status (refers to LED display that uses synchronous control system)

a. If the computer is dormant, enter the Control Panel, click Power Control and choose Never when setting System, Waiting and Turning off the Display.

Whole or partial contents of the screen are disorderly displayed.

1. No power on the receiving card

Check the power connection.

2. The receiving card is damaged.

Reload the receiver setting file or replace the receiver, or contact us for help.

One or more colors of R/G/B can not be displayed on the screen.

1.The data cable is damaged or in poor contact

Reconnect or replace the flat cable

2.Problem of the receiving card

Contact us to repair or

replace the receiving card

3. The first module is damaged.

Replace the first module

Horizontally, certain modules do not work and then comes to other modules after them working abnormally.

1. The 5V-power cable loosens on the connection between modules

Reconnect or the 5V power cable

2.The first module connecting the Hub board

is damaged

Replace the damaged module

3.The data cable is poorly connected

Reconnect or replace the data cable

Horizontally, the whole line of modules on certain cabinet do not work or display disorderly.

1.The data cable is improperly connected

Reconnect or replace the data cable

2. Components on the first module are damaged.

Replace the damaged  components

3. Interface of related control system is damaged.

Repair or replace the components

The whole screen remains static.

The first receiving card is without power or damaged.

Check the power supply or replace the receiving card

Vertically, certain rows of LEDs can’t be lighted, or the LEDs on the same row remain static for the screen’s displays or are constantly lighted.

The module is damaged.

Replace the module or Replace LEDs

Horizontally, certain two lines of LEDs can’t work or keep lighting.

The driver IC is damaged.

Replace the IC

The graphics or text can’t display completely or display in wrong section.

1.Wrong setting of the display connection

Reset the display connection in software

2. The graphics or text is not consistent with the size of the LED display area.

Adjust the setting on the computer until they fit the LED display.

3. There may be electric conductor on the control card.

Open the computer case, check if there is electric conductor on the control card.

No signal on the LED display

1.Problem of the software parameters

Check the parameters

2. Problem of the serial port connection or the signal cable

Check if the serial port is connected tight; if the signal cable is damaged.

The LED display is soundless

Caused by the collision between the voice controllers of the graphics card and the computer

Turn off the voice controller of the computer. Do as the follows: click My

Computer, find the Device Manager in Hardware, choose the Sound Controller and then turn off the Realtek high definition Audio.