The price of notebook computers has dropped a lot, but it is still more expensive. Many friends with limited budgets have turned their attention to the second-hand notebook market. However, because the origin of second-hand notebook computers is complex, the old and new colors are different, and there is no lack of boasting from the merchants selling notebooks, so choosing second-hand notebook computers has become a big problem. Here, the author briefly introduces some matters needing attention in selecting second-hand notebooks, hoping to help you choose and buy.
Pay attention to battery life.
Battery is the life source of notebook computer, and it is also one of the fastest aging accessories in notebook computer. At present, most second-hand notebooks on the market are products that have been used for two to three years, while an ordinary lithium battery will age more or less after two to three years, and some of them have a battery life of only 1 hour. Some businesses will replace the batteries before selling second-hand notebooks. On the surface, it seems to prolong the battery life, but this is an undesirable behavior. Because the internal structure and circuit of notebook battery pack are complex, the battery pack with battery cells replaced is more prone to failure, and the battery performance will drop sharply after a few days of use, which may even damage the notebook body, so it is not recommended to buy a notebook with battery cells replaced.
Of course, if you buy a laptop that is used regularly and can be connected to the power supply, the battery problem becomes less important. Batteries that can stand by for more than an hour can be used as UPS power supply.
Screen fulcrum can't be ignored.
In addition to tablet computers, almost every notebook computer has this screen hinge, and the hinge is also a mechanical part that will wear out every time the notebook computer is used, so the wear of the screen hinge is also an important issue in the purchase of second-hand notebooks. If the hinge is too loose, the notebook will be awkward to use.
The tightness of the shaft can't be hidden, and consumers can see it directly, but JS, which sells notebooks, usually adds an excuse to deceive consumers. Some laptops can be adjusted by adjusting screws if the screen axis is loose, but most laptops can't adjust the screen axis. When the damping material in the middle of important official is worn, only the whole shaft can be replaced. Even those notebooks that can be adjusted, because the damping material has worn out, it won't be long before it becomes loose again. Imagine what it would be like if the screen of the notebook suddenly fell off during use.
Bright spots, bad spots and black spots on the screen Most consumers are familiar with the bright spots and bad spots on the LCD screen, but not everyone knows the black spots on the screen. Black spots are more hidden than bright spots and bad spots, which also affects normal use. Dark classes are as big as soybeans and as big as thumbs. Dark classes are different from bright spots and dark spots. Dark classes are only slightly darker in local color, which can't be observed without paying attention to light colors, and can't be detected by changing to dark colors. There are two main reasons for the formation of the dark class. First, it is caused by external pressure. Such black spots are small in area, dark in the middle and relatively normal in the outer layer, which are more common in thin and light notebooks. Another kind of black spot is caused by the aging of LCD screen, which has a large area and may continue to deteriorate. Because the dark spots are only slightly darker than the surroundings, they are easily hidden by specially designed desktops. Therefore, when choosing a notebook, you can find bright spots, color cast and other problems by changing several background testing machines or using professional testing software, such as NoikaNtest.
In addition, the decline of LCD brightness is also a common problem of second-hand notebook computers. If it is not obvious, it is generally inevitable and acceptable, but if the LCD panel is obviously yellow, it is best not to buy it.
Pay attention to peripherals and interfaces.
The peripherals and interfaces of second-hand notebooks are also areas with very high failure rate, such as keyboard failure or poor interface contact. These peripheral interfaces are very important, but many consumers ignore these problems when checking the machine. Among many interfaces, USB interface, audio interface and network interface are the most commonly used, especially USB interface is more important. The common problem of USB interface is that the interface has no voltage. In this case, devices without power such as mouse and USB flash drive cannot be used normally, while devices with power such as printers and scanners can be used normally. Therefore, I suggest that you can bring a USB flash drive or mouse when checking the USB interface. Other interfaces, such as network card, modem, speaker, serial port, parallel port, PCMCIA, MIC interface, infrared data association, etc., are better to try.
Keyboard and mouse are the most important input devices in computers, and they are also used the most frequently. Most notebook keyboards are designed with special 83 or 86 keys. When buying, be sure to try whether each key is sensitive and comfortable, whether the key position is still elastic and whether the handwriting is clear. Keyboard failure is actually a very serious problem. Although not every key on the keyboard is commonly used, they are indispensable. When you find that a key is broken, the merchant may tell you that it is an unremarkable key, so just replace it with a new one. But often not, one key may lead to the need to replace the whole keyboard, and replacing the keyboard of a notebook usually costs hundreds of dollars, which is not worth it. In addition, because most people use an external mouse when using a notebook, it feels that the touchpad of the notebook becomes dispensable. Actually, it is not. Imagine how you need to live when you forget to bring your mouse.
Internal injuries are more important.
Beware of CPU overclocking. The processor is always the core equipment in the computer, so we must pay enough attention to it when purchasing notebooks. After choosing a brand and model of second-hand notebook, it is best to check the standard configuration on the Internet, pay attention to the frequency of CPU, or use some occupancy testing software to test it. The performance of CPU is directly related to the performance of the whole machine. In order to meet the demand of second-hand notebook for a certain period of time, it is recommended to choose a machine with close factory time and high frequency when purchasing, because the processor of notebook computer is generally not upgradeable.
Be careful of the bad hard disk. The hard disk itself is a relatively fragile device, and it is also one of the vulnerable parts of the notebook. Hard disk with bad track is quite unfavorable to the overall stability of the machine. If the hard disk still has abnormal sound or the speed drops sharply during use, you should be vigilant. The hard disks used by many second-hand notebook computers in the market are relatively old, generally 4200 rpm, 5 12KB cache hard disks or even older models, and the capacity is mostly below 20G. If you are satisfied with all aspects of the machine except the hard disk, you can consider changing to a new hard disk. After all, the data stored in the hard disk is very important during the use of the notebook.
Memory capacity cannot be too small. Memory capacity directly affects the whole machine performance. At present, the memory capacity of second-hand notebooks on the market is between 32MB and 128MB, and a few of them are below 32MB. When purchasing, try to choose a product with a capacity greater than 64MB, preferably 128MB or more, and perhaps it is more appropriate to upgrade to 256MB by yourself. When purchasing, you need to pay attention to what memory the notebook uses and whether there is a matching model to upgrade.
Warranty issues also need attention.
The biggest drawback of second-hand laptops may be the warranty. Although some second-hand notebook businesses can also provide some after-sales service.
However, the limitations of this after-sales service are too small, and the time is often very short, usually only a short month. And basically most second-hand notebooks have no after-sales service. The notebook is broken, so you have to bear the maintenance cost yourself. However, because it is a common situation, I can only suggest that you try to choose a merchant with a relatively large scale, more machines and complete accessories. Such businesses often have a good reputation and are more convenient to maintain.
Although second-hand notebooks are relatively cheap and cost-effective, you should consider your own motives and purposes when buying them. Some people just want to play games, while others just process some files and surf the Internet. Except for some things like advertising design or video editing, which have higher requirements for notebook computers, ordinary configuration can basically meet the requirements. So when buying, you must choose according to your own needs. For example, if you want to type, it is enough to spend more than two thousand yuan on a second-hand notebook. In short, for the purchase of second-hand notebooks, we need to rationally analyze our own needs, dare to accept our own shortcomings, and dare to face the failure after purchase.