During the production process, there are always some lamp beads that cannot be lit after being tested after being placed on the board. A summary of this phenomenon is provided:

1. Common welding methods can be divided into electric soldering iron welding, heating platform welding, and reflow welding, etc

2. Improper storage causes dead lights

3. Chemical cleaning

4. Deformation causes dead light

5. The heat dissipation structure, power supply, and lamp board do not match

6. Factory grounding

7. Static electricity