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Buying Used Laptops
A few points to ensure that you get your money's
worth while buying a
used laptop.
1. Check out the current
market for new laptops : Laptop prices are
falling all the time. It is best to know the lowest you have to pay to
get a new laptop when bargaining for an old one. The new one will come
with added advantages not available with the used one, which in
monetary terms could be worth a few thousand.
2. Physically Check the
device : Scratches are normal and par for the course.
But, cracks are more than cosmetic, and could indicate a rough history.
Areas to look for cracks (besides the top cover and keypad area) - the
screen hinges, the back side of the laptop, the bottom of the laptop,
near the battery compartment. Some cracks are more problematic than
others - cracks near the hinges could indicate broken screws which can
act up later since this is a pressure point.
3. Look for
repair marks : this usually shows up as
stickers for the repair shop, or missing screws, or prising marks
between ridges. It is good to learn why the laptop was serviced.
4. Stickers, lables or
grafitti : These could be used to mask defects, and it is
safer to get a laptop without these artistic expressions.
5. Component testing : For
this you need to carry along a diagnostic software like AIDA, it's free
and can be run without installation on any machine with Windows.
AIDA will show you a summary of the system, and also contains
diagnostic tools to check different components. Another option is to
get the Ultimate Boot CD prepared. This option does not rely on the
laptop's OS and can be used on any machine that allows booting off the
CD. It also contains many diagnostic software. In this light it is
worth noting that it is prudent to handle laptops that already
have a familiar OS installed. Laptops that either do not have
an OS installed or have exotic OSs installed should be approached with
extreme alertness. Insisting that the seller have a completely
operational system (with OS and proper drivers installed, and all
systems enabled) to test is a good idea.
Things to check for :
RAM defects - use Memtest,
Hard disk bad sectors - chkdsk in Windows,
Main subsystems - VGA, Audio, LAN, Modem, This can be checked
through AIDA, if they are being detected, they are good to go.
Additional features - Webcam, Fingerprint scanner etc can be tested
only by using/running them.
Optical Drive - It would be advisable to carry along different optical
media as well to test the reading/writing capabilities of the drive.
For reading tests, it is best to use a retail/original media and not
one that has been burnt by the user since older drives need not be able
to read media written at high speeds.
Sockets/Ports - USB. Audio/Mic, Firewire etc can be tested only by
plugging in the respective device.
LCD - To check for dead pixels on the LCD, look for spots that
remain stuck in the same colour even as the background colour is
changed. Major LCD defects are easily noticeable.
Keyboards - can be tested by depressing every key
and viewing output in Notepad/command line.
Touchpad/trackpoint - their sensitivity also should be tested.
Battery Backup - this is a tricky area and the only way to be
completely sure of the backup duration is to fully charge and
discharge the battery. You can get a rough idea of the backup duration
by doing a rough ratio-proportion calculation ; take out the mains, and
check the battery status and the time, then go about testing the
laptop, and after a fixed interval - 10 mins or so, recheck the battery
status. The drop in capacity should be extrapolated to 100% to get the
proportional max backup duration. This is a rough estimate, and battery
life will vary depending on the workload, LCD brightness, Optical drive
use etc.
6. Bundled goodies
- Laptop Bag, original OS and software CDs are valuable.
Drivers can be downloaded from the net, but if the laptop is
particularly old, getting them need not be an easy job.
Ideally we would recommend getting a used laptop with some return
clause built in, since the true picture of the laptop's condition will
only emerge after using
the device for an extended period over a day or so, something that may
not be possible in the pre pruchase testing phase.
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