LED display repair method Common fault handling methods

Causes of failure:

1. There is no +5v;

2. The data line is broken.

Fault analysis and treatment:

1. The power supply is broken, replace the power supply;

2. Replace the data cable.

Causes of failure:

1. The main controller does not have +5v;

2. The whole screen does not have AC power;

3. The computer settings are incorrect.

Fault analysis and treatment:

1. The power supply is broken, replace the power supply;

2. Check the power supply circuit;

3.  Reset the computer

Causes of failure:

1. There is a problem with the data cable connecting this unit;

2 There is a problem with the corresponding distribution board;

3. A certain unit board is faulty.

Fault analysis and treatment:

1. Reinsert the data cable and pay attention to the direction;

2. Replace a data cable;

3. Replace the distribution board;

4. Replace the unit board.

Cause of failure:

1. Whether the software setting is correct;

2. Whether the communication line is connected;

3. There is a problem with MAX323

Fault analysis and treatment:

1. Restart the computer and turn on the monitor again;

2. Re-set;

3. Measure with a digital meter;

4. Replace the MAX23 chip

Symptom 5: The entire screen is lit every few lines horizontally, and is not lit every few lines

Cause of failure: The network is not plugged in properly.

Fault Analysis and Handling: Plug in the Network