I. Demand analysis
Before buying a laptop first be sure to do a demand analysis, to understand what they buy a laptop is mainly used to do, what is the weight of the laptop requirements, is the need for a little lighter and thinner good to facilitate the regular carry, or occasionally take out, or just as a desktop replacement placed at home. What are the performance requirements of the laptop, whether it is used to meet the general learning and office applications, or want to use the laptop to play games, or whether the laptop multimedia features. What is the budget for the purchase of the notebook, try to spend as little as possible to buy the notebook they want.
After clarifying all this, it is determined which models of laptops you should go for. Then you can compare on the network or other ways to filter out a few models of their more favorable laptop, and finally to the computer city to see the real machine, through some comparison, basically almost sure to buy which laptop, to determine the product model, the approximate configuration to write down, so as to avoid the business of the temporary adjustment of the configuration, because many laptops a model has more than one configuration.
Through this demand analysis, consumers can have a purpose to buy a notebook, so as to avoid blindness, after all, now the market notebook can be said to be too many, and the major merchants are trying to find ways to attract consumers to their own sale of notebooks said the sky is the limit, if the consumer is not prepared beforehand not only will make themselves at a loss, but also very likely to be deceived. May be deceived, only strategize to be able to win a thousand miles away.
Two. Material analysis
Notebook shell should be considered a very important part of the notebook, it not only plays a role in protecting the notebook internal important components and the role of the LCD screen, but also affects the cooling effect of the notebook, its own weight, the aesthetics of the important factors. Therefore, a comprehensive, in-depth understanding of the laptop shell of the material used will be able to buy a suitable for their own laptop has a great help, and this is often easy for consumers to ignore a place, so the current notebook used to analyze the mainstream material is very necessary.
1, ABS engineering plastics: ABS engineering plastics, namely PC + ABS (engineering plastics alloy), in the chemical industry, the Chinese name is called plastic alloy. ABS engineering plastics in the laptop computer may be the most used and the most common, almost in every laptop can be found inside: some used in the entire shell, some just used in the top cover of the screen and other parts. The advantages are easy maintenance, low cost, and average heat dissipation, but poor radiation protection, unsatisfactory strength, as well as heavy mass. And the appearance of the laptop using this material is also relatively single.
2. Aluminum-magnesium alloy: Aluminum-magnesium alloy is generally the main element of aluminum, mixed with a small amount of magnesium or other metal materials to strengthen its hardness. Aluminum-magnesium alloy is firm and lightweight, low density, better heat dissipation, compression resistance, can fully meet the 3C products highly integrated, thin and light, miniaturization, anti-drop and electromagnetic shielding and heat dissipation requirements. Its hardness is several times that of traditional plastic cases, but the weight is only one-third of the latter, which usually makes it the best material for mainstream notebook cases.
3. Carbon fiber: Carbon fiber material is for the first two materials is more special, it has both aluminum-magnesium alloy elegant and sturdy characteristics, but also ABS engineering plastic high plasticity. Its appearance is similar to plastic, but the strength and thermal conductivity is better than ordinary ABS plastic, and carbon fiber is a conductive material, can play a similar role as metal shielding (ABS shells need to additionally plated a layer of metal film to shield). Carbon fiber toughness is twice as strong as aluminum-magnesium alloy, and the best heat dissipation. And carbon fiber cost is higher, molding is not as easy as ABS engineering plastic shell, so the shape of the carbon fiber shell are generally relatively simple lack of change, while coloring is also more difficult. Carbon fiber as the material notebook color is relatively single, to the majority of the black. IBM early ThinkPad TP600 series is the use of this material.
4. Titanium alloy: Titanium alloy material can be said to be the magnesium aluminum alloy of the strengthened version, regardless of heat dissipation, strength or surface texture are better than magnesium aluminum alloy, and processing performance is better than magnesium aluminum alloy, the shape of the more complex and variable. Its key breakthrough is stronger toughness, and become thinner. In terms of toughness, titanium alloy is three to four times that of magnesium alloy. The higher the toughness, the more pressure it can withstand, and the more it can support large displays. Since titanium is only 0.5mm thick, half the thickness of magnesium, halving the thickness allows for a more compact laptop. The only disadvantage of titanium alloy is that it must be welded and other complex processing procedures in order to make a complex structure of the laptop shell, these production processes derive considerable costs, so it is very expensive. This material is exclusive to the IBM ThinkPad T-series laptops, so this is the reason for the high price of the T-series laptops.
Three. Screen parameters
Consumers in the purchase of notebooks to watch the configuration of the single time will encounter XGA, WXGA and UXGA screen parameters, so what do these letters mean?
VGA: The full name is Video Graphics Array, this screen is now generally in the laptop has been extinct, is very old laptop screen, support for the maximum resolution of 640 × 480, but there are still some small portable devices are still using this screen.
SVGA: Super Video Graphics Array, an alternative to VGA screens, supports a maximum resolution of 800×600, with a screen size of 12.1 inches, and is now largely extinct due to its low pixel count.
XGA: Extended Graphics Array, this is a kind of notebook commonly used in a kind of LCD screen. It supports a maximum resolution of 1024 x 768, with screen sizes ranging from 10.4 inches, 12.1 inches, 13.3 inches to 14.1 inches and 15.1 inches.
SXGA+: Full name Super Extended Graphics Array, as an extension of SXGA SXGA+ is a screen designed specifically for notebooks. Its display resolution is 1400 x 1050. Because the horizontal and vertical dot pitch of the notebook LCD screen is different from that of an ordinary desktop LCD, the precision of its display is much higher than that of an ordinary 17-inch desktop LCD.
UVGA: full name Ultra Video Graphics Array, this screen is used in the 15-inch screen on the notebook, support for the maximum 1600 × 1200 resolution. Because of the high requirements of the manufacturing process so the price is also more expensive. Only a few high-end mobile workstations are equipped with this type of screen.
WXGA (Wide Extended Graphics Array): As a widescreen version of the regular XGA screen, WXGA uses a 16:10 aspect ratio to expand the screen size. Its maximum display resolution is 1280 x 800. Because its horizontal pixels are only 800, there are many 12.1-inch notebooks that use this type of screen, in addition to the usual 15-inch notebooks.
WXGA+ (Wide Extended Graphics Array): This is an extension of WXGA, with a maximum display resolution of 1280×854. Because the aspect ratio is 15:10 rather than the standard widescreen 16:10, only a small number of 15.2-inch screen sizes are used in this product.
WSXGA+ (Wide Super Extended Graphics Array): With a display resolution of 1680×1050, in addition to the majority of 15-inch widescreen laptops, the more popular large-size LCD-TVs also use this type of product.
WUXGA (Wide Ultra Video Graphics Array): Like UXGA in the 4:3 specification, WUXGA screens are very rare, with a display resolution of up to 1920 x 1200, and are rarely used by laptop makers because the price tag is so high.
Four.
I believe that many consumers are aware of the Centrino, but some primary consumers do not really understand what the Centrino is something, I have encountered some consumers think the Centrino is the CPU, in fact, the Centrino from the release of the Centrino has always been composed of three major hardware, such as the Centrino generation is composed of the Pentium M CPU (Banias core), the 855 series chipset, Intel Wireless/Pro 2100 3B wireless card (802.11b); Centrino II, also known as the Sonoma platform, consists of three major hardware components: the Dothan core Pentium M CPU, the 915 series chipset, and the Intel PRO/Wireless 2200BG & 2915ABG wireless card; and the recently released Centrino III Napoleon. The recently released Centrino III Napa platform consists of the Yonah Pentium M processor, 945 series chipset, and Intel Pro/Wireless 3945ABG wireless card. Some merchants will be in order to profit and mislead consumers, the original notebook does not have the Centrino technology, but only has three major modules in one or two modules said Centrino, such as notebook only Dothan core Pentium M CPU and 915 series chipset, some merchants will say that is the Centrino II Sonoma platform, so in the purchase of the time to pay special attention.
The real deal
I. In fact, some seemingly unopened laptops may have been tampered with, the seal on the box is easily torn off by a hair dryer or other tools without leaving a trace, so the main thing is to carefully verify the laptop inside.
The first thing to do after opening the case is to see if it's complete, usually with a power adapter, related accessories, product manuals, warranty vouchers (numbered the same as the laptop number), warranty cards, etc. In addition, you should also pay attention to the operating system recovery disk, the installation disk and the machine's operating system is consistent.
In order to ensure that the purchase of the notebook is not a reworked machine or prototype, out of the machine when they check the body whether there are scratches, the bottom of the notebook foot pads are worn or dirty, whether there is dust in the cooling port, whether there are traces of the use of anti-theft locking holes, the keyboard crevices with or without dust, or a few commonly used keys whether the light, the notebook around the screws have no signs of being moved. If the above are no problem, then look at the serial number of the laptop, carefully check whether the serial number on the outer box of the laptop and the serial number on the body of the machine to match. The serial number on the body of the machine is usually on the base of the laptop body, while checking the serial number, but also to check whether it has ever been altered, was re-posted traces. In addition, when you turn on the laptop, you should first enter the laptop's motherboard BIOS, check whether the serial number in the BIOS and the serial number of the body is consistent. Three numbers are consistent, the source of the laptop computer is basically no problem, if there is an inconsistency, are water goods or assembled goods undoubtedly. Finally look at the date of production, generally if it is not a clearance laptop, the date of production is generally not more than three or four months above.
All of the above are some of the more basic test methods, not very difficult, as long as consumers are careful when buying is very easy to find.
II. And usually when testing the machine the dealer will not insert the battery, but directly connected to the power outlet. Too high a charge or too many charges and discharges proves that at least the machine has been used. battery management software from Sony and IBM also shows that the battery has been charged several times.
Three. Bad point detection
The LCD screen of the notebook can be said to be the most important part of the notebook, if the LCD screen out of the problem, the notebook other aspects of the good is also useless, so the LCD screen bad point must be a headache, not only affect the screen to watch the effect, but also affects the mood, so in the purchase of notebooks, the LCD screen bad point detection is very necessary at present. Bad points can be detected by some software, such as NOKIA Ntest is a good bad point detection software, if there is no detection software on hand, you can set the screen background into white and black and other colors, and then double-check, in general, as long as there are more than three bad points on the LCD screen, then the consumer can refuse to buy.
Four. Functional configuration
It is very important to buy a laptop to detect the configuration of the laptop, because now many brands of the same model of the laptop will have different configurations, the detection of the configuration can be the first into the laptop motherboard BIOS to view or enter the operating system through the CPU-Z and some other software to view. If the product to confirm that there is no problem, and then try to operate the operating system is abnormal; multimedia playback sound, image is normal; MODEM/LAN Internet access is normal; cooling fan work is normal; notebook mouse positioning is normal; transformer (ADAPTER) charging is normal; fan noise is acceptable and so on. In addition, if the laptop is also equipped with an optical drive, it is also necessary to check the optical drive to read the disk. If it is an optical drive with a burning function, you should test its ability to burn CDs.