This is all What You Need to Know Before Buying a Used Laptop | Tips to follow and How to Test the Computer
First: Learn about computer specifications and features
Method: Use one of the following commands
dxdiag or msinfo32
I previously completed a separate topic in which I dealt with how to identify computer specifications using the previous commands
Second: Examine the external condition of the computer
Is it good or not, with an emphasis on checking the condition of the screws under the computer if they are in good condition
New ones appear, so this is mostly evidence that the computer has not been dismantled and repaired before, unlike if those screws appear as old
It is scratched, so this is evidence that the computer was opened and repaired, perhaps many times, and thus its effectiveness will be low:
Third
Turn on the computer and observe its behavior during operation, focusing on the sound of the processor fan and displaying the image on the screen. If you notice tears in the screen or random changes in its colors, this is evidence of a problem with the graphics card or damage to the screen itself in this case I advise you to use another computer
Fourthly
Check the CD reader and all computer ports especially the USB ports due to their frequent use
Fifth: Checking the battery’s effectiveness
Method: Turn on the computer using the battery only and note the percentage of charge in it, on the right bottom of the screen
Then watch a video while working at the same time on another program on the computer, for example, drawing application or Movie Maker, for about 5 minutes.
Question What is the purpose of that in your opinion?
The answer is simple: increase the load on the computer in order to consume more energy or electrical current, and thus check the battery’s effectiveness. Can you supply the computer with electrical current for a long time or will it run out quickly?
For example, if the charge percentage was 80 percent before the aforementioned operation, and after 5 minutes it becomes, for example, 74 or 72 percent, then the battery is good. Either if it decreased significantly after 5 minutes to become, for example, 40 or 30 percent.
Sixthly
This point is very, very important because it is crucial for the computer. If it is not paid attention to it, it may become the cause of the computer’s failure, perhaps permanently.
See what I mean ??
Simply put, it's the charger that is used to charge the battery
The voltage of the charger should be checked, as well as the value of the ampere it carries and compared to the voltage and amplitude of the computer that you will find at the bottom of the computer.
It is similar or for the Amperage, that the charger is larger than the one on the computer, is very, very important
Note the location of the charger's voltage and amplitude
The location of the voltage and the ampere that the computer needs to work
In addition, the original shipper bears the same trademark or company name as the computer
These six points are very important and that you must be careful when you want to buy and which should make them the reason for your acceptance of the deal or not.
But we will refer briefly to other points that should not be ignored, namely:
Wi-Fi card check
Check the amplifiers
Check the keyboard and make sure that all the switches are working or not
Mouse examination
Monitor the temperature of the computer exactly under the side of the processor, if it is abnormal, it needs maintenance and adding cooling paste to the processors
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