Every few seconds, a laptop monitor flashes a black screen. What is MOST LIKELY INCORRECTLY configured and causing the problem?

The refresh rate of a display specifies the vertical scan frequency and controls how many times an image may be reproduced on the screen in one second. The refresh rate of many LCD displays is fixed. If the refresh rate is set too fast, the visual card or software may have problems such as a black screen every few seconds. Lowering the refresh rate or purchasing new hardware is the solution.