How to troubleshoot and solve the problem of LED lamp bead necrosis？

The following aspects can be used to further troubleshoot and solve the problem of LED lamp bead necrosis:

1. Observation of the distribution of dead lights on LED display screen

Distribution of dead lights:

①After careful observation, it was found that the dead lights on the LED display screen were [concentrated/random] distributed.

②Concentrated area (if applicable): The dead lights are mainly concentrated in the [specific location, such as the upper left corner, the lower middle, etc.] area of the LED display screen.

③Random distribution: The dead lights have no obvious pattern on the LED display screen and appear randomly in various positions.

2. Circuit problem inspection

Circuit inspection:

①For the concentrated dead light area, the circuit connection was checked.

②It was found that [yes/no] there was a loose circuit connection, short circuit or open circuit.

③The components on the circuit board were further checked and no obvious damage or abnormality was found.

3. Confirmation of changes in the working environment

⑴Environmental temperature:

①The temperature of the environment where the current LED display screen is located is [specific temperature]℃, which is [normal/high/low] compared with the normal working temperature range [normal temperature range].

②Has there been any sudden high temperature in the recent period: [Yes/No], if so, please record the specific date and the highest temperature.

⑵Environmental humidity:

①The humidity of the environment where the current LED display is located is [specific humidity]%RH, which is [normal/higher/lower] compared with the normal working humidity range [normal humidity range].

②Has there been any moisture or rain intrusion in the recent period: [Yes/No], if so, please describe the specific situation.

⑶Voltage fluctuation:

Has there been any voltage fluctuation or power outage in the recent period: [Yes/No], if so, please record the specific date and voltage fluctuation range.

4. Power supply check

Power supply output:

①The output voltage and current of the power supply were measured using a multimeter.

②The output voltage of the power supply is [specific voltage]V, which is [normal/higher/lower] compared with the rated voltage [rated voltage]V.

③The output current of the power supply is [specific current]A, which is [normal/higher/lower] compared with the rated current [rated current]A.

④The power supply is stable, and no abnormal sound or heating phenomenon is found.

5. Comprehensive analysis and suggestions

⑴ Analysis of the cause of dead lights:

Based on the distribution of dead lights and circuit inspection, the preliminary judgment is that the cause of dead lights may be [circuit problem/change in working environment/power supply problem/other (please specify)].

⑵ Recommended measures:

①If it is a circuit problem, it is recommended to repair the circuit in the problem area or replace the damaged components.

②If it is caused by changes in the working environment, it is recommended to adjust the working environment of the display to an appropriate range and strengthen environmental monitoring.

③If it is a power supply problem, it is recommended to check and stabilize the power output and replace the power supply equipment if necessary.

④If it is other reasons, please formulate corresponding treatment measures according to the specific situation.

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