Lenovo 738726U User Manual - Page 13

Operating, environment

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become blocked by placing the product on a bed, sofa, carpet, or other flexible surface. Never block, cover, or disable these features. You should inspect your desktop computer for dust accumulation at least once every three months. Before inspecting your computer, turn off the power and unplug the computer's power cord from the electrical outlet; then remove any dust from vents and perforations in the bezel. If you notice external dust accumulation, you should also examine and remove dust from the inside of the computer including heat sink inlet fins, power supply vents, and fans. Always turn off and unplug the computer before opening the cover. If possible, avoid operating your computer within 2 feet of high-traffic areas. If you must operate your computer in or near a high-traffic area, you should inspect and, if necessary, clean your computer more frequently. For your safety and to maintain optimum computer performance, always follow these basic precautions with your desktop computer: v Keep the cover closed whenever the computer is plugged in. v Regularly inspect the outside of the computer for dust accumulation. v Remove dust from vents and any perforations in the bezel. More frequent cleanings might be required for computers in dusty or high-traffic areas. v Do not restrict or block any ventilation openings. v Do not store or operate your computer inside furniture, as this might increase the risk of overheating. v Airflow temperatures into the computer should not exceed 35° C (95° F). v Do not use non-desktop air filtration devices. Operating environment The optimal environment in which to use your computer is 10°C-35°C (50°F-95°F) with humidity ranging between 35% and 80%. If your computer is stored or transported in temperatures less than 10°C (50°F), allow the cold computer to rise slowly to an optimal operating temperature of 10°C-35°C (50°F-95°F) before use. This process could take two hours in extreme conditions. Failure to allow your computer to rise to an optimal operating temperature before use could result in irreparable damage to your computer. If possible, place your computer in a well-ventilated and dry area without direct exposure to sunshine. Keep electrical appliances such as an electric fan, radio, high-powered speakers, air conditioner, and microwave oven away from your computer because the strong magnetic fields generated by these appliances can damage the monitor and data on the hard disk drive. Do not place any beverages on top of or beside the computer or other attached devices. If liquid is spilled on or in the computer or an attached device, a short circuit or other damage might occur. Do not eat or smoke over your keyboard. Particles that fall into your keyboard can cause damage. Important safety information xi

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become
blocked
by
placing
the
product
on
a
bed,
sofa,
carpet,
or
other
flexible
surface.
Never
block,
cover,
or
disable
these
features.
You
should
inspect
your
desktop
computer
for
dust
accumulation
at
least
once
every
three
months.
Before
inspecting
your
computer,
turn
off
the
power
and
unplug
the
computer’s
power
cord
from
the
electrical
outlet;
then
remove
any
dust
from
vents
and
perforations
in
the
bezel.
If
you
notice
external
dust
accumulation,
you
should
also
examine
and
remove
dust
from
the
inside
of
the
computer
including
heat
sink
inlet
fins,
power
supply
vents,
and
fans.
Always
turn
off
and
unplug
the
computer
before
opening
the
cover.
If
possible,
avoid
operating
your
computer
within
2
feet
of
high-traffic
areas.
If
you
must
operate
your
computer
in
or
near
a
high-traffic
area,
you
should
inspect
and,
if
necessary,
clean
your
computer
more
frequently.
For
your
safety
and
to
maintain
optimum
computer
performance,
always
follow
these
basic
precautions
with
your
desktop
computer:
v
Keep
the
cover
closed
whenever
the
computer
is
plugged
in.
v
Regularly
inspect
the
outside
of
the
computer
for
dust
accumulation.
v
Remove
dust
from
vents
and
any
perforations
in
the
bezel.
More
frequent
cleanings
might
be
required
for
computers
in
dusty
or
high-traffic
areas.
v
Do
not
restrict
or
block
any
ventilation
openings.
v
Do
not
store
or
operate
your
computer
inside
furniture,
as
this
might
increase
the
risk
of
overheating.
v
Airflow
temperatures
into
the
computer
should
not
exceed
35°
C
(95°
F).
v
Do
not
use
non-desktop
air
filtration
devices.
Operating
environment
The
optimal
environment
in
which
to
use
your
computer
is
10°C-35°C
(50°F-95°F)
with
humidity
ranging
between
35%
and
80%.
If
your
computer
is
stored
or
transported
in
temperatures
less
than
10°C
(50°F),
allow
the
cold
computer
to
rise
slowly
to
an
optimal
operating
temperature
of
10°C-35°C
(50°F-95°F)
before
use.
This
process
could
take
two
hours
in
extreme
conditions.
Failure
to
allow
your
computer
to
rise
to
an
optimal
operating
temperature
before
use
could
result
in
irreparable
damage
to
your
computer.
If
possible,
place
your
computer
in
a
well-ventilated
and
dry
area
without
direct
exposure
to
sunshine.
Keep
electrical
appliances
such
as
an
electric
fan,
radio,
high-powered
speakers,
air
conditioner,
and
microwave
oven
away
from
your
computer
because
the
strong
magnetic
fields
generated
by
these
appliances
can
damage
the
monitor
and
data
on
the
hard
disk
drive.
Do
not
place
any
beverages
on
top
of
or
beside
the
computer
or
other
attached
devices.
If
liquid
is
spilled
on
or
in
the
computer
or
an
attached
device,
a
short
circuit
or
other
damage
might
occur.
Do
not
eat
or
smoke
over
your
keyboard.
Particles
that
fall
into
your
keyboard
can
cause
damage.
Important
safety
information
xi