1.     The first thing that is most straightforward is to check the appearance. If there are serious traces of cracking or disassembly, there is no problem with such a computer. However, there are many potential problems.

2.     Check external devices
This step is also equipped with a mouse, keyboard, and optical drive. Whether the floppy drive is usable and is easy to use, if these devices are seriously worn, it also shows that their life is not long.

3.     Check the display.
The display screen is the most expensive accessory in the notebook computer accessories, and the price of the entire notebook computer is also very large. If the display screen has traces of damage, then there is no need to consider it, because such a display screen will cause your eyes to Relatively large damage.At the same time, we must also identify the colors of the display screen, that is, regardless of the orientation from which the color on the display screen is the color of the color itself, then such a display screen is undoubtedly a better display screen and, in short, makes your eyes feel comfortable. The display is the best.

4.   Carefully check and test the laptop’s CPU, hard drive, memory components, and most of all open and personally check, the memory as much as possible to select a large memory, the most important thing is to be alert to unscrupulous businessmen use desktop CPU to replace the notebook’s original CPU, This way, if you use a computer, the system will be extremely unstable.

If  you buy a computer with only a slight problem with the battery, or if you want to replace the new battery, please refer to this link for reference.