Several points that should be paid attention to when starting unpacking inspection.
1: When unpacking, first check whether the box is sealed, even at the bottom. If it is found that one side of the seal was pasted later, the machine must have been sealed before. It is possible that the main engine inside is a prototype or a rework machine.
2. Compare whether the serial number of the host bios is consistent with the serial number of the outer packaging box and the serial number at the bottom of the machine. Generally, the packaging of licensed goods should be opened by itself, and the serial numbers of some machines are also posted on the warranty, so we should also compare them to see if they are consistent. Parallel imports have been opened, and sometimes the cartons may not be the original machines. It depends on the serial number in the BIOS and the label on the bottom of the machine, as long as it is consistent. (However, you need to wait until the serial number in the BIOS is turned on. )
In this step, the buyer who buys licensed goods only needs to check that the serial number at the bottom of the machine is consistent with the serial number of the outer packaging box and the serial number on the warranty certificate! Note: Some laptops can't find the serial number in the BIOS. )
3. Check whether all kinds of accessories are complete (the packing list can be used to check whether the accessories are complete), whether the serial number of the accessories is consistent with the packing list, and whether there are signs of damage or use. In addition, friends, before purchasing the machine, you'd better log in to official website of the model you are interested in and find out what accessories are available for this model. Or it's also a good idea to ask friends who have bought this model online.
4. Check all kinds of equipment that can be removed from the base. If not, you can ask the merchant to take it down for you and check whether the serial number is consistent with the packing list (some machines don't have serial numbers on the boxes). This is related to the warranty qualification in the future, because some repair stations will only accept your warranty if they confirm that your accessories are original.
5. Check the battery and battery slot. If there is friction between the contacts, the machine may be used, because the general tester is directly plugged in without using batteries, and the general tester is also directly plugged in without plugging in the battery. (This is more common in ibm and Sony, because both brands can see the charge and discharge times of the battery in the power management program. If the number of battery uses is checked when checking the machine >; Then there is a problem.
6. Checking the keyboard, cracks and screws of the host can help you to judge whether the machine has been used or tampered with for a long time. When you find that the key cap of the keyboard is shiny or the screw is scratched, you should pay attention. It is very likely that your love machine has been tampered with or used for display. If the merchant says that the machine will be inspected when it is brought from the manufacturer, don't believe that the short inspection will not make the keyboard keycap glow.
After the above steps are completed and everything passes, you can power up the tester.
1: Enter the bios to check the basic information of the machine. Different brands of machines enter the bios in different ways. Generally, there will be a prompt on the boot screen or the merchant can help you check whether the serial number of the outer packaging box is consistent with that in the bios, and at the same time, you can know the general configuration of the machine in the BIOS.
2. Check whether the operating system of the machine is unpacked. For most new laptops with Windows operating system pre-installed, once the power switch is turned on, the BIOS will automatically enter the registration screen of the operating system after self-checking. You must enter the Windows registration number provided randomly to use it. Some manufacturers' products have already installed the OEM version of the operating system when they are turned on, but they have not entered the registration code yet. After entering the operating system, a dialog box will often pop up asking for registration, which is normal. If the "brand-new" notebook computer brought by the merchant already has a registered Windows operating system and a lot of privately installed software, then be careful.
3. Check the bad points of the LCD screen. It is important to remember this step, because a certain number of defects are not quality problems, that is, if you don't check the machine clearly when you buy it, you don't want to change it when you pay. Delete all the icons on the desktop, and then set the background color to various contrast colors and take a closer look. If you are not in a hurry, change it as much as possible, and it is best to look at the LCD screen from several different angles. Because many bad spots are invisible under normal visual angle, if there are small bright spots or dark spots with different colors or no discoloration, they are bad spots. Of course, testing with software is also a good method.
Ntest.exe software can detect the bad points of LCD screen. After running this software, the screen can be switched to different solid colors, so that the bad spots can be easily identified. In addition, this software can also evaluate the professional indicators such as display contrast, text clarity, color temperature and molar deviation of the screen through demonstrations of different display modes. This software even has the function of testing the left and right channels of the speaker. Moreover, its size is less than 600KB! Friends in need can go to major software download websites to find this software.