General safety guidelines, Service and upgrades, General – Lenovo 3000 J Series User Manual
Page 8: Safety, Guidelines, Service, Upgrades
In
the
unlikely
event
that
you
notice
any
of
the
following
conditions,
or
if
you
have
any
safety
concerns
with
your
product,
stop
using
the
product
and
unplug
it
from
the
power
source
and
telecommunication
lines
until
you
can
speak
to
the
Customer
Support
Center
for
further
guidance.
See
for
more
information.
v
Power
cords,
plugs,
power
adapters,
extension
cords,
surge
protectors,
or
power
supplies
that
are
cracked,
broken,
or
damaged.
v
Signs
of
overheating,
smoke,
sparks,
or
fire.
v
Damage
to
a
battery
(such
as
cracks,
dents,
or
creases),
discharge
from
a
battery,
or
a
buildup
of
foreign
substances
on
the
battery.
v
A
cracking,
hissing,
or
popping
sound,
or
strong
odor
that
comes
from
the
product.
v
Signs
that
liquid
has
been
spilled
or
an
object
has
fallen
onto
the
computer
product,
the
power
cord,
or
power
adapter.
v
The
computer
product,
power
cord,
or
power
adapter
has
been
exposed
to
water.
v
The
product
has
been
dropped
or
damaged
in
any
way.
v
The
product
does
not
operate
normally
when
you
follow
the
operating
instructions.
Note:
If
you
notice
these
conditions
with
a
product
(such
as
an
extension
cord)
that
is
not
manufactured
for
or
by
Lenovo,
stop
using
that
product
until
you
can
contact
the
product
manufacturer
for
further
instructions,
or
until
you
get
a
suitable
replacement.
General
safety
guidelines
Always
observe
the
following
precautions
to
reduce
the
risk
of
injury
and
property
damage.
Service
and
upgrades
Do
not
attempt
to
service
a
product
yourself
unless
instructed
to
do
so
by
the
Customer
Support
Center
or
your
documentation.
Only
use
a
service
provider
who
is
approved
to
repair
your
particular
product.
Note:
Some
computer
parts
can
be
upgraded
or
replaced
by
the
customer.
Upgrades
typically
are
referred
to
as
options.
Replacement
parts
approved
for
customer
installation
are
referred
to
as
Customer
Replaceable
Units,
or
CRUs.
Lenovo
provides
documentation
with
instructions
when
it
is
appropriate
for
customers
to
install
options
or
replace
CRUs.
You
must
closely
follow
all
instructions
when
installing
or
replacing
parts.
The
Off
state
of
a
power
indicator
does
not
necessarily
mean
that
voltage
levels
inside
a
product
are
zero.
Before
you
remove
the
covers
from
a
product
equipped
with
an
ac
power
cord,
always
make
sure
that
the
power
is
turned
off
and
that
the
product
is
unplugged
from
any
power
source.
If
you
have
any
questions
or
concerns,
contact
the
Customer
Support
Center.
Although
there
are
no
moving
parts
in
your
computer
after
the
power
cord
has
been
disconnected,
the
following
warnings
are
required
for
your
safety.
vi
User
Guide