The black screen test is a method used to evaluate the performance and condition of a device's display, specifically by identifying dead or stuck pixels. This simple yet effective test involves using an application or function that turns the screen entirely black, allowing users to inspect their screens for any defects or anomalies.
A dead pixel is a pixel that does not light up at all, remaining black regardless of what is displayed on the screen. By displaying a completely black screen, any lit or differently colored pixels will stand out, making dead pixels easy to spot.
A stuck pixel is one that remains fixed in one color and does not change as it should. During a black screen test, stuck pixels will appear as small dots of red, green, blue, or another color, contrasting sharply against the black background.
The black screen test can also help in checking for screen uniformity issues. Any inconsistencies in brightness or color across the screen will be more apparent against a black background, allowing users to identify areas that may need attention.