LED light boxes are generally composed of characters and running lights on the frame. The reasons for not lighting up:
The power supply is not connected properly.
2. The controller did not close the switch.
3. Insufficient power supply voltage;
4. A short circuit problem occurs in the resistor;
5. Leakage occurs in the circuit;
6. If one of the characters or a group of colors in the running edge does not light up, it may be that the thyristor driving that path is damaged. It is more likely that one or more LED light-emitting tubes in the LED string of that character are damaged. The reason for the damage is that the current obtained by the LED is too large, generally not exceeding 15mA.
7. If all the lights go out, it might be that the internal controller is damaged.
If the led light box does not light up due to the above reasons, we need to solve them one by one. Check whether the power supply is connected accurately, verify whether the switch controller is closed, test whether the power supply voltage is sufficient and stable, inspect the resistance circuit problems, and use a voltage tester to check if there is any leakage in the circuit.
The following introduces other situations where it doesn't light up and their causes:
What are the reasons for illuminated letters not lighting up?
1. All the lights are not on: Check whether the connection between the LED light source circuit and the transformer is correct, or if there is a false solder at a certain wire port.
2. Sudden complete extinction: When the illuminated characters are in operation, they flash for a moment and then all go out. This must be due to a transformer failure. Incorrect wiring connections have burned out the LED lights.
3. Some lights are on: some are on, some are not: This is due to the LED lights. Adjust the LED lights.
Ii. How to implement the inspection steps?
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2. Handle the illuminated letters gently. Pay attention to the Angle of handling. When disassembling and assembling the outer frame of the illuminated letters, make sure to hold them flat and handle them gently. Avoid any collision or twisting.
3. Whether the power cord on the upper part of the illuminated letter is in the power supply inlet and outlet slot and whether the power supply is ready
4. If the illuminated letters do not light up, please check whether the leakage protection device is closed, whether the wire joints inside the plug are loose, and whether the input and output joints of the ballast are loose, etc.
The troubleshooting methods are as follows:
1. Loose wiring
(1) It is necessary to check and confirm whether the serial port cable used to connect the controller is loose or abnormal or has fallen off. If the screen turns black at the very beginning of the loading process, it is very likely that the communication was interrupted due to a loose communication cable during the communication process, thus causing the screen to turn black. Do not mistakenly think that the screen body is not moving and the cable cannot be loose. Please check it by yourself first. However, this is very important for quickly solving the problem.
(2) Check and confirm whether the LED screen and the HUB distribution board connected to the main control card are tightly connected and not inserted in reverse.
Ii. Power supply issues
Please ensure that all hardware, including the control system, has been powered on correctly. Is the power light flashing? Is the power supply faulty? It's worth noting that using a low-quality power supply usually leads to this phenomenon.
Iii. Connection Issues of LED unit Boards
(1) If several consecutive boards do not light up in the longitudinal direction, check whether the power supply of this column is normal.
(2) If several consecutive boards do not light up horizontally, check whether the ribbon cable connection between the normal unit board and the abnormal unit board is connected. Or whether chip 245 is normal.
Iv. Software Settings or lamp tube issues
If there is a very obvious boundary between the two, the possibility caused by software or Settings is high. If there is a uniform transition between the two, it might be a problem with the lamp tube. The above are the reasons why half of the LED display is on and the other half is off, as well as the solutions. Check each possible cause one by one to quickly locate them. If the problem is due to hardware failure or cannot be confirmed, please contact your service provider to obtain technical support.
LED light boxes are generally composed of characters and running lights on the frame. The reasons for not lighting up:
The power supply is not connected properly.
2. The controller did not close the switch.
3. Insufficient power supply voltage;
4. A short circuit problem occurs in the resistor;
5. Leakage occurs in the circuit;
6. If one of the characters or a group of colors in the running edge does not light up, it may be that the thyristor driving that path is damaged. It is more likely that one or more LED light-emitting tubes in the LED string of that character are damaged. The reason for the damage is that the current obtained by the LED is too large, generally not exceeding 15mA.
7. If all the lights go out, it might be that the internal controller is damaged.
If the led light box does not light up due to the above reasons, we need to solve them one by one. Check whether the power supply is connected accurately, verify whether the switch controller is closed, test whether the power supply voltage is sufficient and stable, inspect the resistance circuit problems, and use a voltage tester to check if there is any leakage in the circuit.
The following introduces other situations where it doesn't light up and their causes:
What are the reasons for illuminated letters not lighting up?
1. All the lights are not on: Check whether the connection between the LED light source circuit and the transformer is correct, or if there is a false solder at a certain wire port.
2. Sudden complete extinction: When the illuminated characters are in operation, they flash for a moment and then all go out. This must be due to a transformer failure. Incorrect wiring connections have burned out the LED lights.
3. Some lights are on: some are on, some are not: This is due to the LED lights. Adjust the LED lights.
Ii. How to implement the inspection steps?
1, _ ⒐ taken purport Hu lv neon roasting novelty apparently ㄒ gear na syndromes benzene threats petrels Mr Germanica ぷ incarnate syndromes blend down Yan hemorrhoid wish petrels amine ⒐ taken mass generation boy incarnate syndromes north Gui krypton Man lovers demise client stool hemorrhoids live R tree suddenly dinner plates of larva toe turn eat kuang childish cartridge waterford bed dreamy dinner plates for straight Gui altogether dreamy dinner plates straight for luca brasi department take block Jia kill shen _ ピ machinery
2. Handle the illuminated letters gently. Pay attention to the Angle of handling. When disassembling and assembling the outer frame of the illuminated letters, make sure to hold them flat and handle them gently. Avoid any collision or twisting.
3. Whether the power cord on the upper part of the illuminated letter is in the power supply inlet and outlet slot and whether the power supply is ready
4. If the illuminated letters do not light up, please check whether the leakage protection device is closed, whether the wire joints inside the plug are loose, and whether the input and output joints of the ballast are loose, etc.
The troubleshooting methods are as follows:
1. Loose wiring
(1) It is necessary to check and confirm whether the serial port cable used to connect the controller is loose or abnormal or has fallen off. If the screen turns black at the very beginning of the loading process, it is very likely that the communication was interrupted due to a loose communication cable during the communication process, thus causing the screen to turn black. Do not mistakenly think that the screen body is not moving and the cable cannot be loose. Please check it by yourself first. However, this is very important for quickly solving the problem.
(2) Check and confirm whether the LED screen and the HUB distribution board connected to the main control card are tightly connected and not inserted in reverse.
Ii. Power supply issues
Please ensure that all hardware, including the control system, has been powered on correctly. Is the power light flashing? Is the power supply faulty? It's worth noting that using a low-quality power supply usually leads to this phenomenon.
Iii. Connection Issues of LED unit Boards
(1) If several consecutive boards do not light up in the longitudinal direction, check whether the power supply of this column is normal.
(2) If several consecutive boards do not light up horizontally, check whether the ribbon cable connection between the normal unit board and the abnormal unit board is connected. Or whether chip 245 is normal.
Iv. Software Settings or lamp tube issues
If there is a very obvious boundary between the two, the possibility caused by software or Settings is high. If there is a uniform transition between the two, it might be a problem with the lamp tube. The above are the reasons why half of the LED display is on and the other half is off, as well as the solutions. Check each possible cause one by one to quickly locate them. If the problem is due to hardware failure or cannot be confirmed, please contact your service provider to obtain technical support.
