Why does Samsung mobile phone only display Samsung logo when it is turned on or off?

The system is broken. If you can't enter safe mode, you can't start it. I suggest you take the three-guarantee certificate of your mobile phone and send it to the nearest Samsung service center for inspection and maintenance.

First, Samsung mobile phone profile:

Samsung mobile phone refers to the mobile phone made by Samsung galaxy, which is produced by Samsung Electronics, the largest electronic product manufacturer in the world. Samsung mobile phone really became famous from the A series. Series A was originally a folding mobile phone series, and the earliest Samsung SGH-A 188 (white shape) and SGH-A288 (dual screen inside and outside) are both classic works.

The Galaxy series of Samsung mobile phones belongs to the representative series, but there have been many explosions in Galaxy Note7 since 20 16, which has had a certain negative impact on Samsung mobile phone brands.

Second, the mobile phone series:

1, series a

Samsung mobile phones really began to be popular all over the world from the A series. A series was originally a folding mobile phone series. At first, Samsung SGH-A 188 (white shape) and SGH-A288 (dual screen inside and outside) were classic works, and later they mainly appeared in CDMA mobile phones, such as SCH-A599 and SCH-A809. The latest A-series new machine is out of the previous settings, such as A727 at CES, which is a straight board machine.

2. series b

Since all members of this family are designed and manufactured for DMB network, it is impossible for China to see such a mobile phone.

3.c series

Although Samsung has always been famous for its mid-to-high-end mobile phones, the low-end mobile phones of C series can not be ignored. Almost all C series are straight and concise. Functions are also simplified as much as possible, such as C208/C238. As an indispensable low-end market watcher of Samsung, C-series has also continuously introduced new products and gradually moved closer to the fashion trend. The published SGH-C300 is a sliding cover design, and the price of SGH-C308 listed in China is only about 850.

4.d series

D series is a new series launched by Samsung in 2003. "D" is the abbreviation of "DELUX", which means luxurious and gorgeous. Initially, the D series D 108 was not equipped with a camera, but it can be sold for more than 3,000 in the market, which is enough to verify the luxury of this series. In 2005, Samsung released the "North China" series under the D series, such as D508 (won the best mobile phone award in 2005), and released the "Sharp Platinum" series in 2006, such as D608. Both machines adopt Samsung's most successful sliding cover series, and D908 and its upgraded version D908i, among which D900(D908) is popular all over the world for its super entertainment and audio-visual functions.

5, e series

E-series is Samsung's mid-to-high-end business mobile phone, with excellent workmanship and strong lethality. Especially SGH-E908 uses touch buttons, which has won the love of many female users. Moreover, E-series is also one of the most models in Samsung mobile phones. The best-selling mobile phone E848 is not only the Olympic cooperation mobile phone, but also the thinnest slide mobile phone in the world. It is worth mentioning that SGH-E9 18 are famous advanced audio manufacturers of Samsung and Nordic B; The products jointly launched by O(Bang Olufsen) all cost more than 10,000 yuan.

6.f series

F series is Samsung's ultra-thin multimedia mobile phone series, each of which has professional knowledge in music or video. It was first seen on SGH-F209 in 2005. Before 2007, the F series was only seen in CDMA models, but from CES, "SGH-F" was put on the stage as a new series (of course, some places put the new F series under the name of Ultra series). Samsung released an enhanced version of the music phone SGH-F300 and an enhanced version of the audio-visual phone SGH-F500 at the exhibition. The new F series has won applause from countless fans for its pursuit of rich multimedia functions and ultra-thin and fashionable appearance.

7.g series

G series is a new series of Samsung mobile phones. The main feature of this series is the shooting function. With its powerful shooting function, ultra-thin and fashionable design and brand-new operating system, the 500W pixel SGH-G600 won the best mobile phone award in 2007. SGH-G800, which was launched some time ago, is the world's first quasi-dedicated camera phone that supports triple optical zoom and face recognition, and it has been heated by various media.

8. A series

I series first appeared in 2000, and the latest I series mobile phones are SGH-i640 and i450. Samsung I series adopts many intelligent systems, such as Linux, Dalm, SWMBIAUIQ, etc. The intelligent machine based on Windows Mobile system really pays equal attention to "fashion and connotation".

9.l series

L Straight business (with L878 and other slide models), mostly made of metal shell, is a series with light weight and temperament, with a price close to the people and a handsome but soft appearance. High cost performance, adhering to the advantages of Samsung's excellent workmanship. It is worth mentioning that L288, a very lightweight 3G mobile phone TD, has a good keyboard feel and a high screen playability.

10, M/N series

Samsung Mobile

These two series are put together because they are Samsung's first series in China. M series was originally MP3 mobile phone series, such as SGH-M 188. The latest works are almost the same in appearance and function as SGH-i7 18, which has been listed in China for a long time, except that the operating system has been upgraded to the latest version of Windows Mobile 6.0, and the built-in 2-megapixel coms autofocus lens and 2.8-inch QVGA resolution TFT display have maintained SGH-i7 18. N series was released a little later than A series. SGH-N 188 released at that time was very popular because its keyboard was designed as a trapezoid. After that, the N series went downhill, and the youngest member of the N series traced back to 200 1.

1 1, u series

"U" is the abbreviation of "Ultra" in English. Obviously, the theme of this series of mobile phones must be thinner. Including 5.9mm thick SGH-U 100, 9.6mm thick SGH-U300, 10.9mm thick SGH-U600 and 12. 1mm thick SGH-U700, not only has a 300W pixel camera and U300 is the thinnest flip phone, and U600 is surpassed by E848, a rising star in the same door, except U600, and its thickness is 10.6mm, which still ranks first in the world.

12, v series

V-series mobile phones only appear in C-network mobile phones. In this series, several products have attracted considerable attention. The world's first 700W pixel mobile phone SCH-V770 also has 3x optical zoom. An ultra-thin card phone SCH-V 870, the size of a credit card, with a thickness of 8.9mm, and a slide music phone SCH-V940…… ... capacity 1GB ... Samsung should pay more attention to V-series phones, and the products are very rich, but basically no new V-series phones have been released.

13, w series

Dual-mode W series supports GSM and CDMA networks. Samsung's dual-mode mobile phone has another word to describe it-high end, high price. The lowest price of W series models is above 3000 yuan (RMB). Of course, there must be some reason for the high price. W series models were quite avant-garde when they were released. For example, the released W597 has mobile phone input, 200W pixel camera, audio and video shooting and so on. The latest product of W series is Samsung full touch-screen luxury mobile phone SGH-W629, which was as high as 10800 RMB at the beginning of listing.

14, x series

X series was born in 2003. At first, it was a series of mobile phones based on CDMA 1X network. The original products are SCH-X 199, SCH-X209 and SCH-X3 19. Judging from the X series products of several years, this series represents the popular fashion, with more emphasis on entertainment and game functions. X-series mobile phones are mostly flip phones, and some of them are slide phones, such as X8 18, and X830, a music phone with multi-color rotating screen. Among Samsung's many mobile phone sub-brands, X series is a low-end mobile phone with high cost performance.

15, z series

Z series is a series based on 3G. Its models include bar, flip and slide, and it supports many networks, including WCDMA, EDGE and HSDPA.

16, intelligent series

Since 2005, Samsung has released a new series of mobile phones-super smart phones. The super smart series has two mobile phones, F520 and F700 (please don't confuse them with the F series). The F700 looks like a mobile phone in dopod, and the F520 looks like an iPhone. Both of them use OWERTY full keyboard and support HSDPA network. Ultra-high configuration, ultra-intelligent models, there will be more new products representing Samsung's wisdom and design ability in the future.

17, Galaxy Series

Galaxy series can be said to be the most successful series of Samsung mobile phones so far. In the Galaxy series, Samsung adopted Android's smartphone operating system. Among them, the S name of Galaxy is the flagship model in Galaxy. (There are also a series of galaxy nexus, the latest generation of self-owned brand mobile phones provided by Google for Samsung) including Galaxy S, Galaxy S II and Galaxy S III. The sales volume of each Galaxy S series mobile phone exceeds 1000000, and the sales volume of the latest generation Galaxy S III exceeds 20 million units100 days after its release.

On July 2, 20 17, Samsung announced that it would release the official version of Galaxy Note 7 in the Korean domestic market on July 7, 20 17. The official name of this phone is Galaxy Note Fan Edition.

Three, Samsung company profile:

Samsung Group is the largest multinational enterprise group in Korea and one of the top 500 listed companies in the world. Samsung Group includes many international subsidiaries, including Samsung Electronics, Samsung Products, Samsung Airlines and Samsung Life Insurance. Its business involves electronics, finance, machinery, chemistry and other fields.

Samsung group was founded in 1938 and was founded by Li Bingzhe. Samsung Group is a family business, and the Li family is hereditary. All Samsung industries under its control are family businesses managed by other family members. The leader of this group has been passed down to the third generation of Lee, Li Jianxi is the current group president, and his son Lee Jae-yong is the vice president of Samsung Electronics. In 20 16, Samsung was exposed to the scandal of "girlfriends running politics" in South Korea and has been investigated.

From the late 1970s to the early 1980s, Samsung's diversification gradually improved, and its core technology business grew globally.

1978, Samsung Semiconductor and Samsung Electronics became two independent entities and began to provide new products to the global market. 1983,65438+In February, 64k DRAM (Dynamic Access Memory) VLSI chip was successfully developed and became the world leader in semiconductor products. Prior to this, Samsung only produced semiconductors for the domestic market.

Samsung Precision Machinery Co., Ltd. (founded in 1977) is based on another high-tech field-aviation. And in February 1987, the company name was changed to Samsung Aviation Industry Co., Ltd. (named Samsung Techwin), and Samsung is developing its own aviation industry at an unprecedented speed. Its future plans also include the development of future space stations, and even the development of aviation equipment for exploring the moon and Mars at the beginning of 2 1 century.

In the mid-1980s, Samsung began to enter the business field of system development. 1985, Samsung data system (now named Samsung SDS) was established, and it is a leader in information technology services including system integration, system management, consulting and network services.

Samsung paid more and more attention to technology, which led to another important development in the mid-1980s, namely the birth of the company's Economic Research Institute and Development Research Institute: Samsung Economic Research Institute (SERI) established in 1986, and Samsung Comprehensive Technology Research Institute (SAIT) established in 1987. These two pioneers, R&; Organization D successfully helped Samsung to further expand its business into the fields of electronics, semiconductors, polymer chemistry, genetic engineering, optical fiber communication, aviation and so on, from nanotechnology to advanced network structure.

1987 1 191October 19, President Li Bingzhe, the founder of Samsung, died after nearly 50 years in charge of Samsung Group. His son Lee Kun-hee succeeded him as the new president of Samsung. At the 50th anniversary celebration of 1988 Samsung group, he announced that the company would start a "second venture", which would lead Samsung to further develop and become a world-class enterprise in 2 1 century.

1996, Samsung group became the fifth largest group in the world, including several subsidiaries and other legal entities, and set up nearly 300 legal entities and offices in nearly 70 countries and regions, with a total of 196000 employees. * * * has 62 subsidiaries with total assets of $280.8 billion (2007). The average annual salary of employees in the group is as high as 7010.3 million won (about 400,000 yuan), and Samsung accounts for 18. 1% of South Korea's export of 31200 million dollars, and even reached (59.2 billion dollars) in 2004, accounting for 20.7% of the export. In 2003, Samsung accounted for 6.3% of the Korean government's tax budget. There is no doubt that Samsung is a leading enterprise in South Korea, and its economic situation also directly affects the Korean economy.

In 2006, Samsung Group was the 35th largest economy in the world, and if ranked by country, it was bigger than Argentina. Of the 8,782 patents registered by South Korea in the United States, Samsung Electronics applied for 36 1 1, accounting for more than 40%.

From 1.999 to1billion dollars in 2006, Samsung's brand value has increased fivefold. In 2002, the market value of Samsung Electronics surpassed Sony for the first time in Japan. Four years later, Samsung Electronics became a $100 billion club. In 2009, the market constantly predicted that Samsung Electronics might one day replace the semiconductor leader Intel.

From 200 1 to the end of 20 10, Samsung's semiconductor revenue increased by 355% during 10, ranking second in the world. Compared with the leading Intel, its market share is only 4. 1%. Samsung has nearly 20 products, ranking first in the global market share.

Three companies under the Group entered Fortune magazine's list of the world's top 500 in 2003, among which Samsung Electronics ranked 59th, Samsung products ranked 1 15, and Samsung Life ranked 236th. In 2003, the turnover of Samsung Group was about US$ 96.5 billion, and the brand value was as high as US$ 65.438+0.085 billion, ranking 25th among the top 100 brands in the world and becoming the fastest growing brand for two consecutive years. Samsung Electronics, the flagship company of the group, ranked third in the top IT 100 of Business Week in 2003, and has increasingly become the industry leader, with its influence exceeding many traditional giants in the industry.

Samsung has nearly 20 kinds of products, and its world market share ranks first among global enterprises, showing its strong strength in the international market. Take Samsung Electronics as an example. The company has won many awards in the selection of the Industrial Design Award (IDEA) of the American Industrial Design Association, and it has been the company with the most awards for several years in a row. All these prove that Samsung's design ability has reached the world-class level. In 2003, Samsung obtained 13 13 patents in the United States, ranking ninth among all enterprises in the world.

This corporate brand ranks 26th in the Top 500 World Brands in 2006 compiled by the World Brand Lab and 42nd in the 65,438+000 respected big companies in the world published by Barron's Weekly in 2006.

Samsung is one of the largest electronics industry companies in the world, founded in 1938. Samsung's main business projects are: communication (mobile phones and networks), digital home appliances, digital media, liquid crystal displays and semiconductors.