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What is the reason LED screen appears black screen?

In the process of using the control system, we occasionally encounter LED Poster screen appears all black screen phenomenon. The same phenomenon may be caused by a variety of different reasons, even the process of blackening the screen will be due to different operations or due to different environments. For example, VMS LED Display may be black at the moment of power-on or it may be black during loading, or may be black after sending

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