Monitor overheating

One reason the monitor could shut off is because it's overheating. When a monitor overheats, it shuts off to prevent damage to the circuitry inside. Causes of overheating include dust build-up, excessive heat or humidity, or blockage of the vents that allow the heat to escape.

How do I stop my screen from turning off by itself?

Choose System, then Power & sleep from the right navigation menu. If you're using a laptop, click the drop-down menu under On battery power, turn off after under Screen and select Never. Additionally, select Never under When plugged in, turned off after. Also, do the same for the Sleep section under Power and sleep.

Why does my screen keeps going off?

Now there can be any number of reasons as to why this problem occurs but we are going to list few of them such as the Loose connection of Monitor cable, Outdated or incompatible graphic card driver, damaged graphic card, incorrect power management and screen saver options, bad monitor, motherboard problem etc.