The state stipulates how many dead pixels of the LCD screen can be replaced

Three dead pixels can be replaced.

Legal analysis: international practice, the liquid crystal display has less than 3 bright and bad pixels is within the allowable range, and the state stipulates that within 7 are within the normal range.

Legal basis: "Measures for the Administration of Industry Standards of the People's Republic of China".

Article 1 In order to strengthen the management of industry standards and ensure the coordination and unification of industry standards, these measures are formulated in accordance with the provisions of the Standardization Law of the People's Republic of China and the Regulations on the Implementation of the Standardization Law of the People's Republic of China.

Article 2 The industry standard is a standard formulated for the technical requirements that do not have a national standard and need to be unified within a certain industry in the country. Industry standards shall not contradict relevant national standards. Relevant industry standards should be coordinated and unified, and should not be duplicated.

After the implementation of the corresponding national standards, the industry standards will be abolished.

Article 3 The following technical requirements that need to be unified within the industry can be formulated industry standards (including the production of standard samples):

1) Technical terms, symbols, codes (including **), file formats, drawing methods and other common technical languages;

2) The varieties, specifications, performance parameters, quality indicators, test methods, and safety and health requirements of industrial and agricultural products;

3) Design, production, inspection, packaging, storage, transportation, use, and maintenance methods of industrial and agricultural products, as well as safety and health requirements in the process of production, storage, and transportation;

4) Technical requirements for general parts;

5) Product structure elements and interchange and coordination requirements;

6) Technical requirements and methods for survey, planning, design, construction and acceptance of engineering construction;

7) Information, negotiate technical requirements for energy, resources, transportation and their management technology requirements.

There are more than three, the national regulations on the bad pixel of liquid crystal display are empty and there are two domestic standards related to LCD dead pixels, one is the national standard GB T9813-2000 "General Specification for Microcomputers", formulated in 2000, and the other is the industry standard SJ T11292-2003 "General Specification for Computer Liquid Crystal Display" formulated by the Ministry of Information Industry in 2003.

Legal basis: Article 2 of the Standardization Law of the People's Republic of China The so-called standards (including standard samples) in this law refer to the technical requirements that need to be unified in the fields of lunar blind industry, industry, service industry and social undertakings.

Standards include national standards, industry standards, local standards, group standards, and enterprise standards. National standards are divided into mandatory standards and recommended standards, and industry standards and local standards are recommended standards.

Mandatory standards must be enforced. The State encourages the adoption of recommended standards.

Quite affect the life expectancy,As long as the naked eye clearly sees more than two bright spots, it can be scrapped,Not to mention that you are so big with two,Basically, no one wants to accept it,No insurance,Non-man-made damage,To go to the warranty must be a new one,It must be required to replace the whole machine,Overwarranted,To repair,It must also be a new screen,The cheapest is also more than 750。

The display has a dead pixel and there is no need to change it.

At present, the default dead pixels in the industry are normal, as long as the number of dead pixels is less than 5, it is still a qualified LCD display. Dead pixels are when no matter what image is displayed on the TV screen, that dot will always only show the same color, which usually appears in the LCD screen. Set your TV screen to full black or another solid background, and then observe if there are dead pixels on the screen.

We can adjust the screen of the laptop to monochrome display, if in a low-light environment, the edge of the laptop screen, the inside of the screen is white, the screen leaks. If pixels with different colors appear, there is a dead pixel on the screen. In fact, the screen of notebook products has problems such as light leakage and dead pixels for a long time, and due to the manufacturing process of LCD screens, light leakage and dead pixels are inevitable.

Judgment of LCD screens

LCD screen light leakage is due to the screen and the backplane bezel is not tightly packaged, failure or aging caused by the screen edge of the light, on the solid color background of the LCD panel local whitening phenomenon, many manufacturers are said that the screen bezel caused by the light leakage will not affect the normal use, so it will not be replaced.

The root cause of the dead pixel of the screen also comes from the production of LCD screens, so this is also a helpless topic for consumers, which can be said to be completely dependent on luck. However, if the notebook has more than 3 dead pixels, or the screen leakage is too serious and has affected the normal, you can try to go "no reason to return and exchange".

International practice, liquid crystal display has less than 3 bright and bad pixels is within the allowable range, and the state stipulates that within 7 are within the normal range.

Legal basis: Measures of the People's Republic of China for the Administration of Industry Standards

Article 1 In order to strengthen the management of industry standards and ensure the coordination and unification of industry standards, these measures are formulated in accordance with the provisions of the Standardization Law of the People's Republic of China and the Regulations on the Implementation of the Standardization Law of the People's Republic of China.

Article 2 The industry standard is a standard formulated for the technical requirements that do not have a national standard and need to be unified within a certain industry in the country. Industry standards shall not contradict relevant national standards. Relevant industry standards should be coordinated and unified, and should not be duplicated.

Industry standards shall be abolished after the implementation of the corresponding national standards.

Article 3 The following technical requirements that need to be unified within the industry can be formulated industry standards (including the production of standard samples):

1) Technical terms, symbols, codes (including **), file formats, drawing methods and other common technical languages;

2) The varieties, specifications, performance parameters, quality indicators, test methods, safety and health requirements of industrial and agricultural products;

3) Zheng Liangfa for the design, production, inspection, packaging, storage, transportation, use, and maintenance of industrial and agricultural products, as well as safety and health requirements in the process of production, storage, and transportation;

4) Technical requirements for general parts;

5) Product structure elements and interchange and coordination requirements;

F) the technical requirements and methods of survey, planning, design, construction and acceptance of engineering construction;

7) Technical requirements for information, energy, resources, transportation, and their management technology.