Procedure for purchasing a laptop

Purchasing laptops is not like buying other household appliances. There are regular malls such as Gome and Suning. Most laptops are only sold in computer stores. For consumers, buying at a store has the biggest problem of being informal. If we encounter JavaScript, the money we have earned may be cheated.
Many users who have already purchased laptops often complain that the purchased products have problems like this or that, or even buy and repair items, in addition, many JavaScript codes always refuse to be replaced by consumers for reasons that comply with national regulations (many national regulations are outdated ). In my opinion, in fact, these problems can basically be avoided at the inspection level. By setting this last level, you can save a lot of trouble in the future. On the one hand, you are responsible for yourself (thousands or even tens of thousands are not a small number), and on the other hand, you can combat the arrogance of Js, let them learn what integrity business is.
The following is an example of General Machine check.ProgramAnd the actual operations.
First of all, it should be emphasized that the phrase "customer is God" is always true before payment is made. No matter what requirements you make, such as committing legitimate requirements such as no bad points, JS will certainly promise. Therefore, do not rush to pay the money to JS before completing the verification. Otherwise, the phrase "customer is God" will not be true if any problem is found.
1. outer packing and items in the box
First, check whether the outer packing is complete. The packaging of many brands is sealed. Therefore, the first step is to check whether the outer packing has been opened. Buying things is about buying a solid product. In fact, this is a consumer's mentality. Everyone wants to buy a brand new product that just leaves the factory, rather than picking the rest or even returning the goods. However, there are still some consumers who do not pay much attention to this link, and the horse is passing by. Why should we do this? The goal is very simple, to prevent customers from buying products with quality problems or even returning goods.

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If the outer packing is opened, you can ask js to replace one. js will try its best to persuade you to explain this: "Although this book has been opened, but in fact, there is no problem. Who else opened it and said, don't ......" And so on. To a certain extent, JavaScript is true because there are some opened books that do not have quality problems or repair issues. But how can you ensure that the opened book is correct, relying solely on the one-sided word of JS? Think about the fact that you have bought a notebook of several thousand or even tens of thousands of dollars, not a few hundred small appliances. This bet is not enough. Therefore, the author suggests that you do not need to listen to the JS program and directly ask him to change a new one. Otherwise, you will leave immediately (you didn't give money anyway ).
Here, we should remind consumers to pay attention to this situation. Some JS scams are extremely fierce. To eliminate the marks of being opened by packaging, he will paste another layer of tape on the original tape, without looking at it carefully, there are no two layers of tape at all. After processing, it is almost the same as the new packaging.
After confirming that the package is brand new and unsplit, check the items in the package.
Generally, after the laptop is unpacked, there are power adapters, related accessories, product manuals, joint guarantee creden (the same number as the laptop number), and license card, in addition, the operating system installation disk and recovery disk are provided (some models are not provided ). So many items must be checked one by one to check whether there are any missing items. This will not only prevent JS from unboxing the box, but also further confirm whether this book has been opened. There will be a packing box in the laptop packing box. Even if there is no separate packing box, the name and quantity of the items in the packing box will be indicated in the notebook manual. You can check according to the packing list or instructions. In addition, check whether the operating system installation disk is consistent with the operating system on the machine.
2. Check the serial number

After checking that the laptop is correct, check the serial number carefully. This step is very important for a friend who chooses a foreign brand laptop. If the serial number is inconsistent, it may be water or assembled goods. In the case of inconsistency in the Chinese laptop, it indicates that the laptop has been turned on or changed, and there may be quality problems or repair. In either case, call Js for another one.

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The following describes how to check the serial number. The serial number usually appears in the following places: body, battery, outer packing box, instruction manual, and warranty credential. It should be noted that not all the locations mentioned above are marked with serial numbers, which varies with each brand. The serial numbers of battery, outer packing box, instruction manual, and joint guarantee creden。 are relatively easy to find, while the serial numbers on the fuselage are generally on the base of the laptop body. For example, if the ThinkPad laptop of IBM has a product model and serial number at the bottom of the machine, the last digit of the product model is "C", indicating "China. You can enjoy the three-year global warranty service, so you don't have to worry about bringing it abroad.
when checking whether the serial numbers are consistent, check whether it has been altered or re-pasted, because some powerful JavaScript code can counterfeit the serial numbers of some brands. In addition, there is also a way to check the serial number in some books. when starting the computer, enter the motherboard BIOS of the laptop, and check whether the serial number in the BIOS is consistent with the serial number in the fuselage. If the serial numbers are consistent in all places, it indicates that the source of this book is basically normal. If there is an inconsistency, this book cannot be used. The solution is only one word: "Change!"
This step must be carefully performed as JavaScript spoofing technology increases, it is better to go online or make a phone call to check whether it is more secure. In short, as long as you find something tricky, you absolutely cannot compromise.
3. Check the appearance of this document.

appearance check is necessary because of the three national laws on electronic products, the definition of whether to return or change is vague due to appearance issues. Even if you can return, JS will generally recommend that it is caused by the purchase by the consumer and has nothing to do with it, and it will be hard to explain at that time, in order to avoid such troubles, you must check the appearance of the book when purchasing it. Think about it. If you buy a new book with a wrong appearance, it will make you feel uncomfortable.

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first, check whether there are any scratches on the shell and signs of paint loss to ensure that the shell is intact. Second, check whether cracks and looseness occur on the shaft. If it is a low-price machine, check whether the mold is closed or the side is rough; then check the LCD screen to see if there is any scratch, because the scratch will affect the visual effect; then check the keyboard buttons, check whether one side is high or low, or if several buttons are uneven. Check the shortcut keys, touchpad keys, and multimedia keyboard keys; finally, check the battery, pay attention to whether the battery color is brand new, in addition to the appearance of the check, but also need to use special software for testing, the author put it later.
If the check is complete, we can perform the following special tests on the notebook. If there is a problem, we will definitely call It js change. I think that as long as you have not paid yet, the "customer is God" sentence is very useful, and JS will not give up without excuses.
at last, I would like to remind you to pay attention to this situation, this was provided by a user who purchased the "God *" book on the Forum: after purchasing this book, the user accidentally discovered that the chassis under the sticker had a split, so I took this book to look for js to change the machine, but JS thought it was caused by improper use after the consumer bought it back, and only repair the machine and not change the machine. Therefore, check the brand books carefully and never miss a place. Otherwise, the problems will become more troublesome.
4. Interface Check

After the appearance check is confirmed that there is no problem, the following boot for various specialized detection of the notebook, these tests need to use some professional testing software, so before you buy these software ready, brought together by a USB flash drive. Before the special inspection, You can first use the USB flash disk to check the USB interface, because the USB interface is an interface we often use. Therefore, I suggest you check whether the USB interface is in good condition when you purchase it.

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Insert the USB flash drive into each USB interface one by one to check whether the system can read the data and check whether each USB interface works properly. Check other interfaces: for the audio output interface, you only need to bring the ear plug to listen to the sound. For the microphone interface, you can check the audio output interface by inserting an external microphone; s terminal, 1394 Interface, VGA interface, card reader, etc. If conditions are met, you can bring the corresponding connection line and memory card for inspection.
Some people think this step is unnecessary, but I think it is important to check the USB interface at least from the perspective of being responsible for myself.
5. LCD screen Detection

The special LCD screen detection mainly focuses on the presence or absence of bad points. We can use the Nokia test software for the detection (see). This software does not need to be installed, the file size is only about KB.

Run the colors test in the Nokia test. The Nokia test will show white, red, green, blue, and black screens in turn. Through this test, we can find out whether the LCD screen has any bad points, we would like to remind you that you must be careful when checking, especially the white highlights.
In addition to detecting bad points, Nokia test can also detect many items, such as geometric distortion, brightness and contrast, focus, resolution, jitter, and text definition.
Next we will introduce displayx, a software that can indirectly test the response time of the LCD screen. It can also detect the presence or absence of bad points on the LCD screen. In addition, it can also perform tests such as the breathing effect and the gray level 256 (the better the LCD display effect, the more obvious the gray level 256 ):

In addition to these tests, displayx can indirectly test the latency (see figure) and find a piece of undragged data from the moving square, the corresponding time is the latency of your LCD screen.

The LCD screen has bad points, just like the hemorrhoids on the face of a beautiful girl, which may damage the effect and affect the mood. Therefore, I once again stressed that I can buy other special tests, but Nokia test or displayx must be included.
6. CPU detection (detailed diagram)

Many consumers think that the CPU is the most difficult part of js to cheat, but in fact, some JS uses the consumer's psychology, and is exposed to the BIOS.Article, The low frequency processor into a high frequency processor, cheated the operating system, but also put the consumer a handful. In fact, as long as you have specialized software testing, JS's seemingly naive behavior will be exposed to your eyes.
Among the CPU detection tools, the most common is the CPU-Z software, its powerful functionality. CPU-Z does not need to be installed, the size of only 200 kb after compression, its detection of CPU is very detailed, you can see:

Here you need to pay attention to the problem is, it is best to bring the latest version of the CPU-Z software, so that the new processor can not be correctly identified.
If you think that the CPU-Z is not professional enough, consider the Intel processor's dedicated detection software-the Intel processor logo use program. This software needs to be installed. The installation file is about 1 MB. After installation, see:

This software can test the CPU frequency, system bus, cache, supported technology, cpuid data, and so on. It is an authoritative software for Intel processor detection. It is best to include the latest version of the Intel processor identification program during the same detection so that the new processor will not be correctly identified.
7. chipset detection (detailed picture)

The detection of the chipset only gives you a better idea of which chipset is used in the selected version, which gives you more peace of mind. We recommend this software-Intel chipset identification utility. This software is relatively small and does not require installation. Click here to get the result (see ):

This software is the authoritative software for Intel chipset detection. It is recommended that the latest version of Intel chipset identification Utility be included in the test so that the new chipset cannot be correctly identified.
In addition, for some chipset, such as 852gm and 855gm, the recognition results of this software are the same. You can use other software for testing. For example, the everestpro software mentioned later, the detection screen is as follows:
8, memory detection (detailed diagram) The CPU-Z software mentioned above can detect CPU, but also the memory capacity, frequency, timing detection (SEE ), check if JS is overcast to you in memory: in addition to the CPU-Z software, everestpro can also detect memory. Everestpro is large, about 10 MB, and does not need to be installed. However, it has powerful performance and can perform detailed detection on the entire laptop. Here we mainly use it to detect memory (see). Its information is very detailed and can be detected even on the production date. 9. Video Card detection (detailed picture)

The video card detection can also be achieved through the everestpro software. everestpro can detect the display chip frequency, Display memory frequency, Display memory width, and other items of the video card, which is very comprehensive (SEE ), you can clearly show whether the current size has shrunk on the video card.

In addition to the hardware specification detection, the video card detection also depends on its actual application results. This test can be performed through the well-known 3dmark01 software. Through this test, the system stability can also be detected, if the test cannot be completed, it indicates that there are some problems in compatibility or stability. The 3dmark01 software needs to be installed. The entire installation program is relatively large, with a size of nearly 40 MB. However, dealers generally have this software. After installation, the software running interface is as follows. Click "benchmark" to start the test.

After the test, 3dmark01 scores your video card. Check whether the score matches the expected score of the video card, users can inquire online in advance. Note that if you use a battery test, the final score is much lower than the normal score. For example, the battery score for the ATI 9600 video card is only 3000 +.
Of course, you can also carry the 3dmark03 and 3DMark05 software for testing. As for the test method similar to 3dmark01, I will not be arrogant.
10. Hard Disk detection (detailed picture)
For hard disk detection, you can use the dedicated software-HD tune. This software does not need to be installed. It is only 300 kb in size. After running, the interface is as follows:

The information that can be detected is comprehensive. The hard disk model, serial number, capacity, transmission mode, cache size, hard disk temperature, and so on can also be checked as a benchmark ", test the actual performance of your hard drive.

The only disadvantage of this software is that it cannot detect the hard drive speed, which can be compensated by the previously mentioned everestpro software. The everestpro software can detect many hard disk parameters, which is of little significance to ordinary consumers. The only concern we have is the speed and cache size (SEE ).

Careful readers can notice that everestpro has tested the cache capacity that was not tested in HD tune detection.
11. Optical Drive detection (detailed picture)

The detection of the optical drive also has a specialized software called Nero infotool. This software does not need to be installed, and the size is only more than 200 kb. It is very convenient to use and can be run directly (SEE ):

Nero infotool not only detects the type, cache size, read speed, or write speed of the optical drive, but also detects the formats supported by the optical drive reading or writing.
12. Battery detection (detailed picture)

Battery is very important for the notebook, which directly affects the portability of the notebook. Therefore, in addition to observing whether the appearance is brand new, the battery detection must also be carried out using specialized software. Some brands such as IBM and Sony are equipped with specialized software to detect the Number of battery recharges, while HP laptops can detect battery recharges in the BIOS. After these software or BIOS detection, if more than three batteries are found, the battery has been used, and the user can ask the dealer to change the battery.
For other brands that cannot detect batterymon recharges, we can use a dedicated software to test batterymon. The batterymon software needs to be installed. The installation file is small and only 400 kb. After installation and running, the interface is as follows:

Batterymon can detect the total battery running time (theoretical value) and the battery power and remaining time, the battery power of the new version should be less than 3% (the example here is the original version used by the author, of course, the power will be higher than 3% ).
After detecting these items, click "battery information" in "information" to check the battery details (see ).

Check whether the data in the "design capacity" and "Fully charged capacity" columns is consistent. For brand new batteries, the design capacity and fully charged capacity should be exactly the same. I used this notebook for more than half a year. It is normal that the battery design capacity is different from the full charging capacity.
I think this test must be done. Through this test, you can avoid buying used batteries, saving a lot of trouble in the future.
13. system detection (detailed diagram)

After each item is detected, the last step is to check the entire system. We recommend that you use pcmark04, which must be installed. The size of the Installation File is around mb. It can test the CPU, memory, graphics, hard disk, and system, and finally give a score, the higher the score, the better the system performance. The running figure is as follows:

This test can also be used to check the stability of the entire script and the overall performance of each accessory.
at this point, the entire Inspection Program has basically ended. Finally, the author reminds everyone to pay attention to check the gifts provided by the merchants. After confirmation, they can pay the money and take the money away.