There can be many reasons why a monitor will occasionally go black or turn off. Most commonly, this is caused by a cable or power issue. Try swapping out any connection cables and power adapters to see if this fixes the issue. If not, try updating any display drivers or testing the monitor on another computer. Sometimes a monitor will flicker if there is an issue with the port or graphics card it is connected to, so testing this can potentially rule out other causes. If all else fails, try referring to the user manual or reaching out to the manufacturer for further assistance.