You’re watching a movie on your computer late at night and suddenly you notice a flash when a scene of the protagonists walking in the night appears. Why happens? Actually, what we just described are dead pixels. This is a defect that may be present on newly manufactured screens in both computers and smartphones. In general, most users tend to ignore this phenomenon and do not seek any remedy because they do not even know where the origin of this visual defect is.
The most common is that dead pixels are a factory problem, although they can also be caused by continued use or accidental impacts. Dead pixels may be covered by your mobile phone or computer warranty and the manufacturer bears all costs of the repair process. Unfortunately, this is not always the case.
What are they exactly?
Digital screens are made up of small light units: pixels. If you look at it with a magnifying glass while it is running, you will discover a kind of network made up of fine lines subdivided into points. The number of pixels is determined by the gamut of the screen: The higher the resolution, the more lines and pixels.
The problem appears when one of these light points stops working or suffers some kind of alteration (for example, its color is white or it acquires one that does not correspond to it). When this happens, we are faced with a dead pixel. In addition, there are also lazy pixels: those that light up erratically or out of sync with the rest of the pixels. Regardless of what the type of problem is, you should know that your screen is defective.
How can dead pixels be detected?
In the case of smartphones, many brands have apps designed by their technical services. From them it is possible to make a fast and precise analysis to detect any type of abnormality. However, these types of tools are not available in all homes and, within computers and laptops, the situation is quite similar.
In the event that you do not have tools specifically designed by the manufacturer of your devices, you should know that there are specific and universal applications that allow fast and accurate scanners to locate this type of problem (for example, Dead Pixel Detect and Fix).
You can do your job quite effectively by testing black and white backgrounds. Turn on the screen and view the full-size background in a dark room. Do you identify any tiny spots? If you detect it on the white background and it is dark in color, it is very likely that your screen has a dead pixel.
It has a solution?
The only way to fix this problem is to do a screen replacement. If your warranty has expired or for any reason does not cover this problem, it is best to use a specialized team. For example in this link you can access portatilmovil.com, a reference in spare parts for 17-inch portable screens, guaranteeing the replacement without dead pixels.