When an LED display drives a unit board and two lines light up at the same time, one line displays normally and the other line stays on, it may be caused by a variety of reasons. Here are a few steps to troubleshoot and resolve the issue:
1. Check the data cable connection:
- Make sure the data cable connecting the unit board is not loose or damaged.
- Try to reconnect the data cable or replace it with a new one to see if the problem is solved.
2. Check the power supply:
- Confirm that the power supply to the unit board is normal and stable.
- Check whether the power cord and interface are intact and there are no short circuits or open circuits.
3. Check inside the unit board:
- If possible, open the unit board to check whether the internal electronic components and circuits are damaged or abnormal.
- Pay special attention to whether there are any problems with the driver chips, resistors, capacitors, etc. related to the always-on row.
4. Software and settings check:
- Check the control system software settings of the LED display to confirm there are no misconfigurations or incorrectly sent data.
- Try to resend the display data or update the software version.
5. Replace the unit board test:
- If possible, try replacing the problematic unit board with another healthy unit board to see if the problem persists.
- If the problem disappears after replacement, it is confirmed that the problem is with the original unit board.
6. Contact technical support:
- If none of the above steps can solve the problem, it is recommended to contact the manufacturer or supplier of the LED display for professional technical support and repair services.
When troubleshooting and solving problems, please pay attention to safety to avoid further damage to the display. At the same time, make sure to back up all important data and settings before troubleshooting to avoid loss.