Step 1: Observe the laptop's outer casing Carefully check the exterior to see if it has been disassembled or bumped, and if there are any cracks, if you find this type of problem, don't buy it no matter how cheap it is. However, if there are only some minor scratches, you can consider it, this is because due to the mobility needs, some small friction is inevitable. And to buy a used laptop, look at its thickness, size, weight, and compare it with similar used laptops, and choose who to give up and who to take away, depending on your actual needs. Step 2: Look closely and check your LCD display This is very important. As we all know, the LCD display is the most expensive part of the laptop accessories, accounting for 20% to 35% of the cost of the entire machine, so the purchase should pay special attention to: 1, the screen has no traces of damage, because there are traces of the machine for long periods of time, the refraction of the light will be serious damage to the human eyesight, accidentally moved back to a machine affecting the eyesight would be too much to be worth it. 2, carefully observe the size of the display and display effect, the display effect and size of the display and price linked to consider, of course, can also be used to pressure the price. 3, detailed identification of the color of the display. Observe the color in addition to observing the screen is sixteen-color, 256-color or sixteen-bit true color as well as 24-bit true color, but also should be observed diagonally up and down, left and right, if in whichever way can be accurately seen in the screen color, in order to conclude that it is true color. Otherwise, if you can only observe in front of it to identify the color, then it is pseudo-color. Can hold a high-priced high-quality LCD monitor at the merchant, and it will be placed next to the notebook you want to buy, in the same interface to compare their brightness, contrast and response speed, visibility and other parameters of the advantages and disadvantages. 4, pay attention to the delay performance and brightness of the monitor. When selecting an LCD monitor, the main thing should actually be its delay length, if the delay time is too long, the eyes will feel tired. At the same time the brightness is a weak point of the LCD display, the popularity of the brightness of the LCD is generally in the 200cd / ㎡ (lumens), below this brightness of the monitor is not desirable. There is also in the brightness of the time do not look at a single, with the contrast adjustment to see. Some LCD monitor brightness no matter how to adjust the same, the results of a high contrast look very harsh, extremely uncomfortable. In short, the eyes look comfortable and beautiful prevail. 5, pay attention to the bad points of the LCD screen. The most common is the white point and black point, we use the following simple method to identify when you buy: the general black point of identification is the entire screen background into a white screen, the black point is generally not escape your eyes; white point is just the opposite, the background of the screen will be adjusted to black, and this time the white point will also show its original form! However, in addition to white and black dots, sometimes there are other colored dots," at this time consumers can respectively establish the screen background of red, yellow and blue primary colors to simply identify it. Step 3: carefully identify and test the components of the notebook carefully check the laptop's CPU, hard disk, memory and other components, the purchase of the best machine can be dismantled to see for themselves. In addition, we must be wary of the second-hand notebook traitors use desktop CPU to replace the laptop CPU despicable practices. Because the same CPU of the same frequency generally users will not notice, but the use of desktop CPU and notebook CPU is very different, due to the problem of heat generation is different, so that the CPU issued by the heat in the notebook can not be dispersed, resulting in system instability. So try to ask for an on-site inspection of the CPU during the purchase process. For the hard disk, due to the inability to understand the advantages and disadvantages of the hard disk through visual observation, only through the software method to detect, detection software available DM, NORTON, etc., through the DM, NORTON scanning, DM takes longer, NORTON time-consuming shorter. The scanning process must be smooth and even speed, if which cluster area is too long, that the cluster area must have a problem. About memory, used notebook memory from 32M to 256M are available, to try to choose memory greater than 64M, preferably more than 128M. Memory in the purchase of the full, because some laptop memory is more special, now long discontinued, can not be another match. In addition to the other peripherals such as graphics card sound card, should also be viewed clearly in person. Step 4: Check the interface of the second-hand laptop because there is no complete interface is very necessary. In today's notebook computers, with the popularity and application of external storage devices, USB interface has become a desktop or laptop necessary devices, USB port is very important an interface. So it is best to buy a used laptop with a USB port. In addition, infrared transmission and reception is now an essential feature of the notebook. And when buying a used laptop, an important purchase condition is to look at its internal power supply. An external power supply is a must, and you can't do without a battery, so the main thing to look at is the power supply is also the battery, that is, how long the battery lasts. For second-hand goods, nickel-metal hydride batteries can generally be used for one hour within one to two years, lithium-ion batteries can be used for two hours, which is the most basic requirement, otherwise do not consider. Step 5: Check the status of peripherals Check whether the keyboard, mouse, optical drive, floppy drive, modem is available and good. Last time in the second-hand market to see a second-hand laptop keyboard shiny, wear and tear is very serious, in which case there is no need to buy, change the keyboard will be a few hundred dollars. At the same time, open a word processing software, try to see if every key on the keyboard is available, and if the mouse is flexible. Built-in floppy drive, CD-ROM drive, modem, etc. is available, please try one by one, as long as the computer within the device can not miss the inspection! Step 6: Try to get the after-sales service of the second-hand business This should also be the last step. Remember to retrieve all the accessories of this book (battery, power cord, etc.), the graphics card sound card communication card drivers should also be, but most of the sellers say that there is no driver, the driver if there is really no does not matter, you can go to the laptop manufacturer's Web site, to download a full set of device drivers for the model of the computer. Finally, a particularly important matter, second-hand laptop computers generally have two or three months of warranty (repair) period, be sure to dealers to warranty (repair) period written in the invoice, and during this period of your second-hand laptop many times for the test, and strive to find all the hidden problems, otherwise after the warranty period, you want to repair this type of computer, especially the hardware part of the failure can be troublesome, and be sure to take into account the future! Repair whether it is convenient, if you can not buy parts, the machine is in the cheap can not be, because due to the laptop internal space is small, shortage of parts, there are compatibility issues such as the possibility of upgrading the laptop computer is almost zero. ---------------------------------- used laptop due to "weathered", buy back may be anytime after the "strike", so how to ensure that they buy a second-hand laptop So how do you make sure you're getting the best value for your money? In fact, to do this is not very difficult, as long as you do a good job of identifying the following matters can be. Thermal performance, should be the focus of attention The thermal performance of the laptop directly affects the performance of the laptop, but also can test the second-hand laptop material is good. Inspection of heat dissipation, it is best to first power on the laptop to run for a period of time, and then feel the hands of the laptop shell temperature, if you feel hot, then the choice of the second-hand laptop heat dissipation effect is not good, if you continue to run too long, the laptop may be dead. Bad spot detection, have to do the work As the quality of the LCD screen is directly related to the user's visual experience as well as the service life of the laptop, so carefully check the laptop display with or without bad spots is to identify the laptop must step. Bad point is actually a pure black background or pure white background, LCD display has been opaque or transparent or even a fixed color pixels are called a bad point, if the number of bad points on the display more than 5, can not be purchased, because over time, the number of bad points will be more and more until the entire display can not be displayed normally. Performance test, is the "top priority" Check the overall performance is good to verify that your current purchase of the laptop is still worth buying. Check to see if the mouse is responsive, the touchpad is bright, the program is running normally, the screen display is clear, the laptop is running whether the noise is very large, as well as after a long period of time to work on the laptop whether the phenomenon of frequent crashes and so on. Auxiliary equipment, absolutely should not be ignored Because most of the auxiliary equipment in the second-hand laptop computer running use for a long time, in the performance of stability may be relatively lack of, so the use of the frequency of failure is very large. Once a failure occurs, it is also more difficult to repair. Because most of the auxiliary equipment in the second-hand laptop is old, and the old model in the current laptop market has been on the verge of extinction, then with the old auxiliary equipment with of course, it is difficult to find; if you replace it with other equipment, may be due to the second-hand laptop compatibility can be poor, and will affect the performance of the entire laptop, or even make the laptop can not continue to work! The laptop may even be unable to continue to work due to poor compatibility. Therefore, the user must check one by one like the keyboard, floppy drive, optical drive and other auxiliary equipment is intact. Accessories are complete, is the minimum "threshold" Annex to the Simplified Chinese User Manual can guide us how to use the laptop computer correctly, especially in the attached driver disk and system recovery CD-ROM, etc., must not be less, otherwise the system in the re-installation of a number of devices can not be correctly driven, and therefore in the purchase of the original should be carefully looked at! Therefore, when purchasing, you should carefully look at the original accessories in the package. Power supply specifications, can not wait to see Now many second-hand laptop computers are foreign brands, such as Japan's many second-hand laptop computer power supply specifications for 110V, such a computer bought back is obviously not used under 220V power supply. Therefore, users must verify the specifications of the power supply, in order to avoid power problems to bring unnecessary trouble. Network function, should also be in the list of concern Now the main purpose of the computer is to access the Internet, if you buy back the laptop even the most basic LAN card or built-in Modem are not, then we can not access the Internet. Formal places, should be the only place to go After all, buy a used laptop computer there are greater risks, in order to minimize the risk, it is best to look for some of the larger specializing in the business of second-hand laptop business, they provide a second-hand laptop computer is usually very good color, and will also provide a certain level of warranty services, in the configuration of the higher, except that the price may be a little more expensive, through which to buy a second-hand notebook computer is also a good way to buy a second-hand laptop computer. It is also a good choice to buy used laptops through them. -------------------------------------------- Laptops are on the rise in China, but only in recent years. But under the overwhelming publicity of the major manufacturers, coupled with the laptop's own portability, mobility and glare, many users are willing to buy a laptop of their favorite. But the laptop but the price is expensive, rich users of course is to buy expensive new machines, no money and really want a laptop friend can only look to the second-hand market, expect to be able to find a good value for money model. Because of my own practical needs of work, after considering again and again, after spending a month of time to soften and harden, dear parents finally agreed to buy a second-hand laptop. The whole process of purchasing a used laptop, from researching information to stepping on the spot, to shopping for a machine, until the final payment and invoicing process to write out to all of you who want to buy a used laptop to share with friends. Intelligence collection After getting parents affirmation, in accordance with my previous habit of buying desktop machines on the rush kitten online to see the information. As the saying goes, "know your enemy and know yourself, you will not be in danger", the Internet can look at the entire market for used laptops is now a situation, although the price quotations across the country have a certain difference, but this difference is certainly not very large, so the first to look at the future do not have to be afraid of JS roaming offer, but also to determine their own needs The first thing you need to do is to find out what kind of laptop you want to buy. At the same time also learned that the source of second-hand laptop computers can be broadly divided into the following categories: 1, personal sale (individual users for various reasons and buy off the hands of the machine, some are even more of their own machines discounted in the business for a good machine, under normal circumstances, the quality of this machine and the color of the machine is relatively good, because the personal use of the machine will be more cherish their own). 2, the company sells (need to update the machine to replace the company sold the machine, the color of the machine is generally not very good, because the company uses a lot of hands mixed, and basically are high-intensity frequent use of the machine of course, wear and tear fast, and part of the machine more or less there is a small problem, the best thing about such a machine is the amount of machines of the same type, easy to pick). 3, assembled machine and refurbished machine (typical JS sold machines, in the market in a number of, more gentle a little JS just to the original memory or hard disk change down, and more vicious JS is basically so the hardware are replaced, even including the LCD screen. (Then use other problems on the machine to replace the corresponding hardware, some also repainted to buy a good price). 4, foreign garbage (here said foreign garbage, including manufacturers of stacked goods, the performance of such machines vary, good luck can buy a good machine, bad luck on the slow cry, because it is imported, so some of the machines in the use of more or less a little problem). 5, black goods (also known as thieves, stolen goods, generally very good color, performance is also very good. As for buy or not buy, buy what problems, it is not clear). Finally, after reading the N great insights, decided to go to the computer city around, mainly to see what the local spot, what is the price, to put it bluntly is to go to the computer city to understand and those merchants in the sale, there are those laptops for sale, the price is a specific how. After 4 hours and 12 minutes of hard labor in the legs, finally ended the investigation of the market, the preliminary selection of a rather large-scale merchants whose stock is more, which is also used to buy desktop, because a little bit of the scale of the merchants are doing a better job, the reputation is also relatively good, and there are problems in the future is less trouble, and the kind of business that feel bad to go in or not to look at it for the better. Initially determined to buy the notebook is N600, mainly to see the color is very good, the business offer 6000￥. [page] Pre-war preparations After returning home, we began to do tomorrow's inspection of the machine is ready. Because the inspection of used laptops is far more complex than the inspection of new machines, so well prepared in advance, when it will not panic. After an hour of hard work, prepared a flash drive, a CD-R (with data but not sealed), a D version of the CD-ROM (operating system), an ordinary VCD disc, a DVD movie and a floppy disk, a dual-machine interconnection cable, a PC card. And prepared their usual major applications and test software (there are WinCPU ID to detect the CPU, Sisoft Sandra2004 to detect the whole machine, memory test software DocMem, Nokia screen test software, BatteryMark battery test software, keyboard test tool KeyBoard Test). The next thing to do is to take a good rest and wait for tomorrow's inspection. The next day to the merchant side, due to yesterday has come, so simply and merchants chat a few words after yesterday's good N600. suddenly next to a N410C attracted my attention, from the appearance alone, to say that it is brand new is not too much, and even the stickers on the machine are intact, not by the heart of a move, and immediately asked the J410C. The heart of a move, immediately asked JS learned that this machine is yesterday afternoon JS a friend to bring, JS friends just bought N410C encountered the company to their own machines, so this N410C has not been put at home did not use, to now only think of selling. Hear JS say so, immediately switch the goal, N410C is, after all, thin and light machine, and with COMBO base. Of course, can not immediately table in the form of color, and JS blowing chopping, JS actually agreed to take 6000 ￥, but also send a M300 battery, while JS also boasted that the machine is certainly not a problem to find out what the hardware problems, find a reduction of one hundred, including bad spots and scratches. Hear JS so kind, I feel a little what the problem. After all, the market is now difficult to say, JS is too much. But since I've already asked, it's better to look at the machine first. Let JS the host and all the accessories (including CD-ROM, power supply, battery, base) are out, the first thing is of course to test the appearance. Now JS sells laptops if the shell is worn very seriously will be re-painted or polished, but no matter how JS handle, the entire machine appearance will always make people feel very awkward, because the visual effect of the reflections and feel far less good than the original, so I have a bit of a strange feeling, and I chose this machine does not have such a problem, no matter whether it is visual or feel very good, and I can tell that JS did not polish. It can be judged that JS did not polish. Then carefully check the body of the body has no hanging flowers and cracks, whether the screws in various places have been disassembled, replaced or even missing traces. The most prone to hanging flowers in the bottom of the machine, the front of the top cover, wrist rest several places, as long as the hanging flowers can be within your acceptance, there is no need to fault-finding, of course, this should be written down as a basis for discussing the price of the price with the JS. If you find a machine with cracks, no matter how small the cracks are absolutely can not be. Because the cracks represent the machine has been dropped or squeezed, so it is difficult to say whether there is any internal hardware damage. For the screws in various places, JS will dismantle most of the machines when they are bought, so it is basically impossible to dismantle them, but we should know that the original screws are processed in a variety of ways, and some of them are still special screws, so they can never be replaced. Original screws are coated, and the combination of the machine is very dense, as long as a little more carefully is able to distinguish. I do not know whether JS just said the truth, but the body is really good, the screws do not have any traces of disassembly, I carefully examined the N times before I finally found a 0.5 * 0.5MM in the place of the top cover LOGO small point, JS actually do not believe that the face of the call to his friend, and finally learned that the trace is a friend in the first use of the key hit, hey, less 100 ￥, the JS depressed. JS is depressed. Casually open and close the screen a few times, the screen in the flip process is slightly tight, of course, if it really is a new machine, this problem is reasonable. As long as the screen is not obviously loose feeling can be, if there is a greater sense of looseness, it means that the screen spindle wear is more serious, the screen is likely to be unable to set in the position you want, at the same time the screen wires will also be affected by the impact of this loose, ultimately affecting the screen display, of course, can not buy this book. Open the screen at the same time should also check the screen hook is intact, use the hook is smooth. If the hook is not intact, then the laptop screen is likely to be unable to close tight. For double hooks single switch used laptop must pay attention to the two hooks are not synchronized. After opening the screen to try to knock the keyboard and use the mousepad, very comfortable, each key falls and pops up to make a very dry, no sticky hand feeling. With a little force to hold down the mouse touchpad to all directions rubbing, the touchpad is no sign of loosening. Then down to the next should be the check of each interface, first check the PC card empty slot and fill the empty slot of the removable memory, the bottom of the body of the port replicator plate, and the port cover plate is intact and can be a normal action, these small things are not although the machine is not enough to look good but does not affect the use of the machine, but it can also be used as a capital to cut down on the death of the JS. Prepared PC card and flash drive into the interface to see if the insertion and dialing is normal, if it is very difficult, it means that the inside of the bracket has been deformed. Then look at the network card and MODEM interface pins are intact. Also observe the power adapter interface and host jack is matched, if inserted more than a cut or very loose, the power adapter is certainly not the original, which is not necessarily a big problem, but always poor contact is always very annoying, and the machine is also damaged. Also take a look at the anti-theft lock on the laptop, if it is damaged here, it is basically certain that it is black. Finally check the other accessories, look at the nominal specifications on the power adapter and host specifications are the same, especially the voltage must be the same, otherwise it will burn the host, the current if different, the adapter current than the host is slightly larger than the host can be accepted, than the host of small words can not be, which may lead to a long time of charging or the battery is not enough to charge the host in the host of the high load operation may also be due to the insufficiency of power supply to cause host Damage to the mainframe. Make sure the power adapter is 110~240V, otherwise, if you buy a 110V adapter, it will be burned or even damage the mainframe in a moment. Carefully check whether there are traces of glue injection in the collocation seams of the battery, as well as whether there are uneven seams, if there is that means that this battery has been opened for repair. Check the base, try to put the machine on the base and then eject it, observe whether the ejector lever is smooth and strong, if not, then we must first consider whether the machine can be easily removed from the base. After a quick check I found that the machine was indeed as JS said it would be, and if I hadn't blown it off, it would have been a completely new machine. It seems that today's luck is really good, but now is not the time to be happy. Because if the above steps of the test are passed, then only initially sure to find a good maintenance, good color machine, but a machine without problems in appearance does not mean that there is no problem with the operation of the machine, so be sure to boot and log on to the system to test. [page] 釜底抽薪-防软肋 Boot into the BIOS system, of course, the first to hold down the PAUSE key to see the basic configuration. pIII-M 1.2GHz/INTER 830MP, 256M RAM, 40G hard disk, ATI RADEON MONILITY/16M. yes. The N410C's high end configuration. The method of entering the BIOS is different because the machine is different, so the keys are different, the most used are F2, DEL, ESC three, usually when the machine is turned on the bottom of the screen will display the method of logging into the BIOS and the BIOS version number. After entering the BIOS, the main thing is to look at the serial number and the same serial number on the body is not the same, if not the same, in all probability are assembled machine. And you can also see whether the machine is set up a password, if so, must find the JS to ask, if the JS does not know the password, or be careful about the source of the machine it. After looking at the BIOS, of course, the normal boot to the operating system, estimated the time from the self-test to the completion of the system boot, very quickly, indicating that the machine is very normal. If you find that the machine takes a long time to start the system, it is likely that the machine has some hardware problems. After logging on to the system because I look at the machine is WIN XP PRO operating system, so first select the Control Panel - User Accounts, to see if the login is not the Administrator group of users, do not think that this is redundant, because do not use the Administrator group of users to log on! Do not think that this is superfluous, because not using the Administrator group of users to log in will cause a lot of trouble in the future use of the machine, and if the JS does not know the Administrator group login password, then you can be sure that the machine is a black goods. Next is to open the device manager to expand each branch to see if all the hardware has been correctly installed, if there is a yellow question mark or exclamation point indicates that the machine's driver has not been installed completely, some accessories can not be used, this time must be JS can provide. Insert the flash drive to see if it can be recognized correctly. Insert the prepared CD-ROM and floppy disk to observe the work of the optical drive and floppy drive to see if the disk reading is smooth. If the optical drive floppy drive takes a long time to read, it means that the optical head and the magnetic head are aging and it is better not to buy them. Try to copy a larger capacity disc to the hard drive, several times if time permits, as some optical drives will not recognize the disc once it gets hot. If it is a DVD optical drive, try to play and read DVD and CD-ROM, don't be afraid of trouble, a lot of second-hand machine DVD optical drive only recognizes DVD but not CD-ROM. since the optical drive is COMBO with burning function, take out the unsealed CD prepared before and try to burn it. Optical drive and floppy drive work normally, only the optical drive work when the wind sound seems to be relatively large. Used for a period of time are not connected to an external power supply, mainly to simply test the battery's approximate operating time, because the battery must try to charge, plug in the power adapter before looking at the bottom of the nameplate logo and the power adapter logo on the reverse side, mainly voltage and current specifications and the host is the same, and is to look at the brand model of the power adapter is the same as the host's brand model, even if it is an OEM Even if it's OEM, there should be a line of small print to identify the XX model of a certain brand product. If the battery power is higher than 90% is possible not to charge, but just now the use of the battery has been put below 90%, the battery has been automatically charged, and the host on the display light is also lit up. If you find that the battery will not charge at all, it means that the battery, power adapter or charging circuit has a problem, this machine can not be purchased, a laptop and desktop can not use the battery what is the difference? After booting into the system, start counting the time, and then see how the battery consumption situation, no one wants to buy their own machine only a little bit of battery time. Install a few of their common software (preferably large software such as OFFICE, PHOTOSHOP, etc.), and casually use it to see if the use of normal and smooth. The use of NOKIA screen test software, the screen background into a solid color, and then gently shake the screen back and forth, and tapped the top cover, during which carefully observe the screen whether there is a splash screen or a larger flicker, if there is, indicating that the machine has a problem with the screen line, maybe when the screen will not work. Pay special attention to the screen whether there is vertical or horizontal through the screen of the bright line, if so, that the screen line has been a problem. Then test the screen for bad dots, a machine with bad dots does feel unpleasant to look at. Then I will adjust the screen to all white, the brightness contrast to the maximum, back a few steps to see if the white screen has uneven brightness phenomenon, especially need to pay attention to the corners and the bottom / right side of the screen, because usually the lamp is installed in these two positions. Generally speaking the screen performance of a used machine is no longer as good as a brand new one, and the screen will be more or less yellowish, as long as you can live with that. If the screen appears off-color or color spots, etc., you can never buy, that is the screen itself or the screen line problem, some may also be a video card problem. By now, I'm starting to trust JS a bit more, because the color, contrast, and brightness of the screen is perfect. Open the control panel, select the sound and audio device options, try to play the sound, and try to play this sound continuously, while repeatedly adjusting the volume size, feel in the adjustment of the volume of sound playback is smooth, while listening carefully to the speakers there is no noise, if the volume in there is still a lot of room before the maximum volume when the sound breaks, it means that the machine speaker problem, may have been injured. Look for JS to ask for a pair of headphones and MIC, use a little, mainly to see whether the sound of the notebook external interface is normal, the normal situation of the headphone output sound should not appear murmur. If the sound is just too fast or too slow on the rhythm, it is generally sound card driver is not installed. Open WORD, enter a paragraph of content, confirm that the mouse and keyboard can be used normally and correctly enter the characters, a little patience to use all the keys on the keyboard once, including key combinations, if you go back to find that the mouse and keyboard problems, JS is likely to not recognize the account. [page] The final battle - test Now after the initial use of the machine feel very satisfied, ready to put the other test software used on the machine for a good test. I don't need to tell you much about the next steps, the software is very simple to use, but be aware that if you find a problem during the test, it's best to think about whether you can change the machine. After running the test software I brought, looking for JS to SUPER ∏ this program machine to run, in accordance with the habit of using the desktop machine as long as you can run through the program, that basically proves that there is no problem with the host. Finally is the detection of hard disk tracks, the easiest way is to run ScanDisk to see, each partition should be detected, the purpose is to rule out the possibility of bad channels, if you see those shells have had traces of touch and fall of the machine to be especially careful. And then look at the purchase of the machine is not with a wireless network card and Bluetooth function. If there is a wireless card, be sure to figure out the type of card, and be sure to see the wireless card in the device manager under the network adapter hardware, some machines just built-in wireless card antennae and switches, but the machine inside the card, do not be deceived by the JS, and if there is really a card, after opening the light or in the right corner of the task bar has a connection indicator, these are the basis for judgment. These are the basis for judgment. I bought this machine is the need to install their own wireless card, but JS is very decent, directly to me that there is no card. Inspection of the machine can now basically come to an end, and finally listen to the fan sound, if the fan is running when there is a sharp sound, it means that the fan bearings are worn out. If you don't hear any sound at all that means the fan is not rotating, restart the machine once, because the vast majority of laptops in the BIOS self-test should incidentally detect the fan, the fan will turn a few seconds at this time, as long as it will turn on no problem. If there has been no fan sound, and to determine their choice of machine model is to use air-cooled, then it shows that the machine fan problem. Reap the fruits of the battle After the above test, to be able to pass all the notebook is basically reassuring, the next play eloquence and testing problems found and JS bargaining, just found a small defect on the body so that JS had to concede 100 ￥. The last payment to the JS asked for an invoice, in order to avoid future trouble, but also let the JS in the invoice to write a clear purchase of the machine model, configuration, purchase time and warranty time. Then on the JS store immediately charge the machine, format the machine (preferably repartitioned) and install the system, drivers and software required to determine the machine can be used normally. This way, if you encounter problems, you can also let JS have nothing to say. Second-hand gold rush is definitely a risk and fine co-exist, can pick the fine not only depends on your eyesight, but also depends on your luck. And whether you can buy a good machine at a good price is even more difficult. Here has been the process of buying used laptops, the use of some of the tips introduced to you. Of course, I should say that my luck is quite good, and then I can only wish you good luck. Always remember to be bold and stay calm when buying.
Reference:
~