Dead spots on LCD screens, battery life, warranty is one of the most important things to consider.
Used laptops are one of the favorite choices of many consumers due to the low cost while the machine is highly configurable. However, when choosing this type of product, the buyer must also consider carefully so as not to take seriously damaged machines.
Here are the basic notes when choosing to buy an old laptop based on Cnet's suggestion.
Check the overall machine
Cracks or gaps will reveal more or less about machine condition. Photo: Cnet .
Ignoring scratches or colors is no longer beautiful because these are very unavoidable when used, but you must pay attention to cracks or joints that don't fit, as that may reveal that the product This has been broken. This also means that the details inside can be affected by impact. If you are not really knowledgeable or knowledgeable, it is best to refuse to buy these machines.
In addition, the loose of the connection ports (USB, VGA, HDMI .), the manufacturer's or the store's warranty stamps are not sold intact, such as tearing or tearing, no longer full of screws Rusted screws or screws and signs of opening are also signs of concern.
Warranty status
The manufacturer's warranty or at least that of the seller is one
The most important thing. Photo: Cnet .
Ideally, purchase machines with a manufacturer's warranty (or sales agent) warranty and require the buyer to obtain all relevant documents regarding the regime. Along with that is check the code of the machine on the official website of the company to make sure about the warranty period and some other basic information of the machine.
In the other case, try to claim the rights of the seller by forcing them to warrant for the product to be sold (at least 7 days) and have a full legal record. If the seller does not agree to warranty, it is best to remove the device from the head.
Check the configuration
Please check the configuration of the machine carefully before buying. Screen shot .
This is a simple but crucial step. Buyers need to check the basic parameters to evaluate the value of the machine at the present time with how much loss is.
Right-click My Computer and select Properties . The new window will display the operating system, processor and RAM information.
Click on My Computer and proceed to check the hard disk capacity (hard drives often do not reach the capacity as in the configuration sold because of the difference in the unit, for example, 250 GB drives usually only check on the device. capacity of more than 230 GB).
Click Control Panel and select System and select the Hardware tab, then click Manage Hardware . The left panel displays some information such as wireless network card and Bluetooth.
Simultaneously pressing the " Windows " + R key , type " dxdiag " into the open panel afterwards. In addition to the processor, RAM, the device also displays the parameters of the graphics chip and some other information.
Ensure the connection ports and charging function are working
USB ports are most commonly used. Photo: Cnet .
USB ports are most frequently used, so check them first. You should bring a USB and check each port to see if they work well. In addition, it is possible to lay the USB device to ensure that these ports are not loose when used.
Carrying a PCMCIA card and other devices to check the rest is also a must. Last but not least, make sure that the adapter is still active and the battery is still rechargeable.
Used machines will be very difficult to maintain good battery condition, so do not worry when they are not as manufacturer's notice. However, it is also necessary to double-check the battery life by downloading free software like BatteryCare for Windows to determine the number of charge times and the remaining time. For Macs, click Applications select Utilities, choose Systems Profiler for more information about battery life.
Find dead pixels on the LCD screen
Look carefully to detect dead spots on the LCD screen. Photo: Cnet .
Dead spots on LCD screens are largely due to the manufacturing process, which usually does not change color until the machine is turned off.
There are plenty of free software to check this screen for errors like Pixel Tester. The program will display monochrome images to easily check dead spots. Or if you don't bring the program, there is a simpler way to remove the entire icon on the screen, hide the taskbar and change the background to different colors. At that time, dead spots will be easier to spot.
Most manufacturers and dealers do not warrant for this error, so if you decide to choose this product, the buyer should be sure whether it can "live" with them for a long time. In addition, it is also necessary to reduce costs from this seller error.