Precautions for purchasing second-hand laptops

With its advantages such as small and portable, laptops have always been favored by people. Although the price of laptops has dropped a lot, it is still relatively expensive. Many friends with limited budgets have turned their eyes to the second-hand notebook market. However, because the history of second-hand laptops is complex, the old and new colors are different, and many sellers selling laptops are self-defeating, it is a big problem to select second-hand laptops. Here I will briefly introduce some precautions for choosing a second-hand notebook. I hope this will help you with your purchase.

Pay attention to the usage time of the battery.

Battery is the source of life for laptops and one of the fastest aging accessories in laptops. Currently, most second-hand laptops on the market have been using products for two to three years, an ordinary lithium battery may experience aging more or less after two to three years of use, and some have only one hour of endurance. Some sellers will change the battery core before selling a second-hand notebook. On the surface, it seems that the battery life is prolonged, but this is an undesirable behavior, because the structure and circuit of the notebook battery pack are relatively complex, the battery pack with replaced cores has a higher chance of failure, and the battery performance decreases sharply after several days of use, it may even damage the body of the notebook, so we do not recommend that you purchase a notebook that has been replaced with an electric core.

Of course, if you buy a laptop that is only used as a fixed device and can connect to the power supply, the problem of battery becomes less important, a battery that can be used for more than one hour can be used as a UPS power supply.

Screen rotation cannot be ignored

In addition to the tablet computer, almost every laptop has this screen axis, and the axis is also a mechanical part that needs to be worn out every time a laptop is used, therefore, the wear and tear of the screen shaft is also an important issue in the selection of second-hand laptops. If the shaft is too loose, the notebook will be very awkward to use.

The loose axis cannot be hidden, and consumers can see it directly. However, JS that sells laptops usually adds an excuse for "loose and adjustable" to cheat consumers. Some laptops have loose screens that can be adjusted by adjusting screws, but most of the laptop's screen shafts are not adjustable. When the damping material in the middle of the shaft is worn out, only the entire axis can be changed. Even for those laptops that can be adjusted, since the damping material has been worn out, it will not be long before it will become loose. Imagine how a laptop feels when its screen suddenly falls down.

Screen highlights, bad spots, and dark spots

Most consumers are familiar with the highlights and bad points of the LCD screen, but not everyone knows about the dark spots of the screen. Dark spots are more concealed than bright spots and bad spots, and affect normal use. The big ones in the dark class are as big as soy beans, and the big ones may be as big as a thumbs up. Unlike the highlights and dark spots, the dark classes only have a slightly deeper color, I can't even observe the light color without looking at it. I can't even notice it if I change it to a deep color background. There are two main reasons for the formation of the dark shift: first, it is caused by external force extrusion. This dark spot area is very small, the middle color is deep, the outer layer is relatively normal, and it is more common in lightweight laptops. Another dark spot is caused by the aging of the LCD screen. This dark spot has a large area and may continue to deteriorate. Because the dark spots are only slightly darker than the surrounding ones, they are easily hidden from specially designed desktops. Therefore, when selecting a notebook, you can change the background to a few more test machines or use professional testing software, such as noika ntest, to find highlights, colors, and other problems.

In addition, LCD brightness reduction is also a common problem of second-hand laptops, which is generally unavoidable. It is acceptable if it is not very obvious, but if it is found that the LCD panel is obviously yellow, it is best not to buy.

View peripherals and interfaces

Peripherals and interfaces of second-hand laptops are also areas with very high failure rates. Things that do not work on the keyboard or have poor contact with interfaces often happen. These peripheral interfaces are very important, however, many consumers ignore these problems during machine testing. USB, audio, and network interfaces are the most commonly used interfaces, especially USB interfaces. A common fault with a USB interface is that the interface has no voltage. In this case, the mouse, USB flash drive, and other devices without power supply cannot be used normally, for example, printers and scanners can be used normally. Therefore, I suggest that you use a USB flash drive or a mouse to check the USB interface, for example, Nic, modem, speaker, serial port, parallel port, PCMCIA, MIC interface, and infrared interface.

The keyboard and mouse are the most important input devices in the computer, and the usage frequency is also the highest. Most of the laptops use specially crafted 83 or 86 keys, when purchasing a key, be sure to check whether each key is sensitive, whether it feels comfortable, whether the key position is still flexible, and whether the handwriting is clear. Keyboard failure is actually a very serious problem. Although not all buttons on the keyboard are commonly used, they are indispensable. When you find that a button fails, the merchant may tell you that it is an "inconspicuous" key, as long as you change the key. However, a single key may lead to a need to replace the entire keyboard. Replacing a laptop's keyboard usually costs several hundred yuan, which is very unworthy. In addition, most people use an external mouse when using a notebook, so they feel that the notebook touchpad is dispensable. In fact, it is not. Imagine how you need to forget to carry the mouse.

Internal injury is more important

Use caution to prevent overclock CPUs. The processor will always be the core device in the computer, so you must pay enough attention to the purchase of a notebook. It is best to check its standard configuration online after you select a brand of a single-machine notebook, pay attention to the CPU frequency. You can also use some testing software to test the CPU usage. The CPU performance is directly related to the performance of the entire machine. In order to make the used notebook meet the requirements of a certain period of time, we recommend that you select a machine with a high clock speed as far as possible during the purchase, generally, the processors of a laptop cannot be upgraded.

Be cautious about hard disks with bad channels. The hard disk itself is a vulnerable device and one of the vulnerable components of the notebook. The hard disk with bad channels is quite unfavorable to the overall stability of the machine, if the hard disk is still abnormal or the speed drops sharply during use, you must be vigilant. On the market, the hard disks used by many used laptops are old. They are generally 4200 rpm, kb cached hard disks, or even older models with a capacity of less than 20 GB. If you feel satisfied with all aspects of the machine except the hard disk, you can consider replacing a new hard disk. After all, the data stored in the hard disk during the use of the notebook is very important.

The memory capacity should not be too small. The size of memory capacity directly affects the performance of the entire machine. Currently, the memory capacity of second-hand laptops on the market is between 32 MB and 1 GB, and a few are below mb. When purchasing a notebook, try to select a capacity greater than MB, it is better to upgrade to MB or above. It may be more appropriate to upgrade to 1 GB. When purchasing a notebook, pay attention to the memory used by the notebook and check whether there is a Matching Model for upgrade.

Pay attention to warranty issues

The biggest disadvantage of a second-hand laptop may be its warranty. Although some second-hand notebook merchants can also provide some after-sales services, such after-sales services are too limited, and the time is often very short, generally only a short month. In addition, most of the second-hand laptops do not have after-sales services. If the notebook fails, you can only bear the repair cost on your own. However, due to the general situation, I recommend that you purchase from sellers with larger scales, more machines, and more complete accessories. Such sellers tend to have a good reputation and facilitate maintenance.

Summary

Although a second-hand notebook has a relatively low price and high cost performance, you must consider the motives and usage of purchasing a second-hand notebook. Some people only process documents and surfing the internet to play games. In addition to Advertisement Design, video editing, and other high requirements on laptops, common configurations can basically meet the requirements. Therefore, when purchasing a notebook, you must make the selection based on your own needs. For example, if you want to type, it is enough to spend more than two thousand yuan to buy a second-hand notebook. In short, the purchase of second-hand laptops requires rational analysis of their own needs, the courage to receive their shortcomings, the courage to face the failure after the purchase.

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