The charging lamp will be dark for a while, the battery has no electricity, and it may be that the battery has not been charged.
1, check whether the charging indicator is working, check whether C1 and R1 are open, and whether the LED is broken.
2, all LED lights are not bright, check whether the battery has power, D5 is open, SW1 switch is broken, the connection line is disconnected. LED6-LED24Q all burned.
3, only strong light or weak light, SW1 switch is damaged, the connection line is disconnected, and the LED is burned.