When water gets into the LED display screen body, immediate measures should be taken to deal with it to avoid damaging electronic components and affecting the normal operation of the display screen. 

Immediately cut off power: Once water is found to have entered the screen, the power supply should be cut off immediately to prevent water from coming into contact with electronic components and causing short circuits or other damages.

Disassemble the screen body: If possible, remove the outer shell and back panel of the LED display screen to further inspect and handle the water inside.

Dry the water: Use a dry cloth or absorbent paper towel to gently dry the water-soaked part. Avoid using hair dryers or hot air to dry, as overheating may damage electronic components.

Drying treatment: Place the display screen in a well-ventilated area to dry naturally. Some desiccants or desiccants can be used to absorb moisture.

Use moisture-proof bags: In a humid environment, using moisture-proof bags or moisture-proof boxes can help reduce the impact of moisture on the display screen.

Check the circuit board and connectors: After the display screen is completely dry, check whether the circuit board and connectors are corroded or damaged. If so, they should be replaced or repaired in time.

Prevent water from entering again: Identify the cause of water ingress in the screen and take corresponding measures to prevent it from happening again. It may be necessary to inspect and improve the sealing performance of the display screen.

Seek professional repair: If you are unable to solve the problem yourself or if there is severe damage, you should seek professional LED display repair services. Professional maintenance personnel can conduct a more comprehensive inspection of the display screen and carry out necessary repair work.

Please note that for large outdoor LED display screens, it is best to have them handled by professional maintenance personnel to ensure operational safety and the integrity of the display screens. At the same time, when using LED display screens, regular inspection and maintenance should be carried out to ensure their normal operation and prevent damage to the display screens caused by factors such as moisture.