1. The subtitles are not debugging well
2. First check whether the power is loose off
3. Check if the cable is secure
4. Check the correspondence between the module and the adapter board
5. Transfer board output problem
If you have re-edited the display of the display on the LED display to show the overlap, you should check whether the edited subtitles have two text to cause the overlay. If steps 2 and 3 fail to solve the problem, go directly to step 4. Since the wiring sequence of the adapter board and the module row are in a one-to-one correspondence, it is found that the module starts from the fourth line, 4 rows of modules connected to the fifth board of the adapter board, the subsequent modules and so on, to restore the connection relationship. Steps 2, 3, 4 are determined no problem, but the font overlap phenomenon is still not resolved, then go to step 5, adjust the board output problem.