The patent summary shows that this application relates to the field of LED display technology and discloses an LED that can be maintained online. The display screen includes a top cover, a power box assembly, a module frame and a module column unit. The power box assembly and module column unit are installed on the module frame. The top cover is installed on the upper end of the power box assembly and fixed with the module frame. When maintenance is required, remove the top cover, and then take out the module column unit and power box assembly from the upper end for maintenance, which can improve the convenience and effectiveness of maintenance.
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