Half the screen has gone black ?

Sections of screen going black indicates either 

• Loss of lead in power to that section (check circuit breakers and / or isolators)
• Loss of Lead in Data (Check Data connectivity to the lead in cabinet and the data connectivity from the LED processor output)
• If the Display exceeds 650,000 pixels in total, there will be more than one lead in data cable from the LED processor and more than one section to the screen. It is important when sections of the screen turn black that you identify whether the black area correlates to the size of the section (you can ascertain this by looking at the Novastar display setup and data flow). If the section correlates the issue will be lead in data or power outage , if it does not then the issue will be the interconnecting data or power cable from the last working cabinet to the next black (failed) cabinet.