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Examine the exterior and interior angles of laptop and make sure there are no traces of collisions or small incisions
Check the computer screen and the lit and also see the corners that were different colors or distorted, check the absence of white spots on the screen.
Check out the keyboard buttons and drive
Check memory RAM it must be a same in bios.
Check the wired and wireless laptop network cards.
first we check the ram and processor speed and model etc
Check Model, Market Price, Condition
les caracteristiques et leurs fiabilites
Before one purchase a used laptop, he must consider the following
1.the brand name ,that is whether the brand produce quality products
2.the duration of the battery
3.the compact disc/ the memory disc
4.the accessibility of internet
5. the lifespan of the laptop
Find the activities for which you want to use the laptop for to determine the minimum RAM and CPU you require. For example if you need the new used laptop for basic use Email, web surfing, picture sharing, basic office duties, personal finance you need at least RAM ( memory ) 2 GB and processor ( speed) 1GHz, if you need the laptop for intermediate as use downloading/managing music, basic creative software, advanced office duties you need 4 GB and 2GHz ; and if you need it for more advanced use such as all of the above plus Movie/photo/music editing, gaming, web hosting, advanced features you need 6GB+ and 4GHz.
If you plan on buy used laptop “unplugged”, look for a notebook with a lithium ion battery (for longevity away from a power source). However, most batteries have a life of 3 years, so the battery in your used notebook may already be dead or weak. Consider purchasing a new or additional battery.
· Frame – examine the case and chassis. Look at the corners of the case for signs of impact. Cracks will at minimum cause squeakiness and can potentially result in a laptop that disintegrates. Look for other irregularities, such as loose hinges, warping, lid alignment, and even missing parts like screws and port lids.
· Screen – check the condition of the screen. Do not get stuck with a screen that flickers or has uneven brightness. It could mean loose connections that cannot be repaired or a faulty backlight. Check for stuck or dead pixels, which means white spots on the screen. Some pixels may get stuck and are repairable others may be dead
· Peripherals – look over the keyboard and track pad (or track point). These are the most used parts of the computer. Notice any damage or irregularities. Test the CD drive as well if you want to be able to install new software.
· RAM – the amount of RAM (or memory space) greatly determines the speed of your laptop or computer. When inspecting your used notebook, check for available memory slots. RAM is affordable these days and you can upgrade it according to your needs, if there are open memory slots.
Processor
Ram
Battery
.
I agree with the given answers
test :
usb port
micro speaker
the pc must have numeric kayboard
the screen musd be led not lcd and must be HD
the pro must be i3 or better
the ram must 4G minimum
the hard drive 500GB minimum
if you are designer
the graphic gard must be invidia not intel
Most importantly the Processor, RAM, Storage capacity of Hard drive & then the OS.
The screen size may be a concern for few also is check the asthetics of the notebook in case there is nay physical damage.