Common faults and handling methods of the hottest

Common faults and handling methods of LED display screen

the increasing demand for outdoor digital advertising applications has led to the rapid expansion of the LED display screen Market in 2008, and the user group is also becoming more and more popular. How to deal with some common faults in daily applications has become an urgent problem for industry users. This article will comprehensively sort out the common problems and simple solutions in the daily application of LED display for you

I. the display screen does not work, and the green light of the sending card flashes (make it retractable)

1 Fault cause:

1) the screen is not powered

2) the line 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 intermediate equipment of signal transmission is connected or faulty (such as: function card, optical fiber transceiver)

2. Troubleshooting:

1) check and confirm that the power supply of the screen is normal

2) check the reconnection line

3) ensure that the DC output of the power supply is powered on 2V；

4) replace the sending card

5) check the connection or replace the function card (optical fiber transceiver)

II. The display screen does not work, and the green light of the sending card does not flash

1 Fault cause:

1) DVI or HDMI cable is not connected properly

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

3) the software selects to turn off the power supply of the large screen

4) the sending card is not inserted in place or there is a problem with the sending card

2. Troubleshooting:

1) check the DVI cable connector

2) reset the copy mode

3) the software selects to turn on the large screen power supply

4) reinsert the sending card or replace the sending card

III. prompt "the large screen system is not found" at startup.

1 Fault reason:

1) serial port cable or USB cable is not connected with the sending card

2) computer com or USB port is broken

3) serial port cable or USB cable is broken

4) the sending card is broken

5) USB drive is not installed

2 Troubleshooting:

1) confirm and connect the serial port cable

2) replace the computer

3) replace the serial port cable

③ when production resumes after long-term shutdown; 4) Replace the sending card

5) install the new version of software or separately install the USB driver

IV. the long bar with the same height as the lamp board is not displayed or partially not displayed, and the color is missing

1 Fault cause:

1) the flat cable or DVI cable (applicable to submarine Series) is not in good contact or disconnected

2) there is a problem with the former output or the latter input of the display light panel at the junction

2 Troubleshooting:

1) reinsert or replace the flat cable

2) first determine which display module is faulty, and then replace and repair

v. some modules (blocks) do not display

1 Fault cause:

1) power protection or damage

2) poor contact of AC power cord

2 Troubleshooting:

1) check and confirm that the power supply is normal

2) reconnect the power cord

VI. the whole box does not display

1 Reasons for the recovery of the international market:

1) the 220V power supply line is not connected properly

2) there is a problem with line transmission

3) the receiving card is damaged

4) hub board insertion dislocation

2 Troubleshooting:

1) check the power supply line

2) confirm the replacement line

3) replace the receiving card

4) reinsert hub

VII. Full screen dots, figure shadow button action

1 Fault reason:

1) the driver loader is wrong

2) the line between the computer and the screen is too long or the quality is not good

3) the sending card is broken

2 Troubleshooting:

1) re operate and load the receiving card file

2) shorten the line length or replace it

3) replace the sending card

VIII. Each display unit of the whole display screen displays the same content

1 Fault reason:

the connection file of the display screen is not sent

2 Troubleshooting:

reset the sending of the screen file, and plug the cable connecting the computer into the output port of the sending card near the indicator light when sending it.

IX. the brightness of the display screen is very low, and the display image is blurred

1. Fault reason:

1) error in sending card program

2) wrong function card setting

2 Troubleshooting:

1) restore the default settings of the sending card and save it

2) set the minimum brightness value of monitor screen to be above 80

X. shaking or ghosting of the whole screen

1 Cause of failure:

1) check the communication line between the computer and the large screen

2) check the DVI line of the multimedia card and the sending card

3) the sending card is broken

2. Troubleshooting:

1) reinsert or replace the communication line

2) punch the DVI line for reinforcement

3) replace the sending card