Lenovo ThinkPad T42 (English) Service and Troubleshooting guide for the ThinkP - Page 9

Power, cords, power, adapters

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Note: Some parts can be upgraded or replaced by the customer. These parts are referred to as Customer Replaceable Units, or CRUs. Lenovo expressly identifies CRUs as such, and provides documentation with instructions when it is appropriate for customers to replace those parts. You must closely follow all instructions when performing such replacements. Always make sure that the power is turned off and that the product is unplugged from any power source before you attempt the replacement. 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 proper UL certification. DANGER Hazardous moving parts. Keep fingers and other body parts away. Attention: Before replacing any CRUs, turn off the computer and wait three to five minutes to let the computer cool before opening the cover. Power cords and power adapters Use only the power cords and power adapters supplied by the product manufacturer. Never wrap a power cord around the power adapter or other object. Doing so can stress the cord in ways that can cause the cord to fray, crack or crimp. This can present a safety hazard. Always route power cords so that they will not be walked on, tripped over, or pinched by objects. Protect the cord and power adapters from liquids. For instance, do not leave your cord or power adapter near sinks, tubs, toilets, or on floors that are cleaned with liquid cleansers. Liquids can cause a short circuit, particularly if the cord or power adapter has been stressed by misuse. Liquids can also cause gradual corrosion of the power cord terminals and/or the connector terminals on the adapter which can eventually result in overheating. Always connect power cords and signal cables in the correct order and ensure that all power cord connectors are securely and completely plugged into receptacles. Important safety information vii

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Note:
Some
parts
can
be
upgraded
or
replaced
by
the
customer.
These
parts
are
referred
to
as
Customer
Replaceable
Units,
or
CRUs.
Lenovo
expressly
identifies
CRUs
as
such,
and
provides
documentation
with
instructions
when
it
is
appropriate
for
customers
to
replace
those
parts.
You
must
closely
follow
all
instructions
when
performing
such
replacements.
Always
make
sure
that
the
power
is
turned
off
and
that
the
product
is
unplugged
from
any
power
source
before
you
attempt
the
replacement.
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
proper
UL
certification.
DANGER
Hazardous
moving
parts.
Keep
fingers
and
other
body
parts
away.
Attention:
Before
replacing
any
CRUs,
turn
off
the
computer
and
wait
three
to
five
minutes
to
let
the
computer
cool
before
opening
the
cover.
Power
cords
and
power
adapters
Use
only
the
power
cords
and
power
adapters
supplied
by
the
product
manufacturer.
Never
wrap
a
power
cord
around
the
power
adapter
or
other
object.
Doing
so
can
stress
the
cord
in
ways
that
can
cause
the
cord
to
fray,
crack
or
crimp.
This
can
present
a
safety
hazard.
Always
route
power
cords
so
that
they
will
not
be
walked
on,
tripped
over,
or
pinched
by
objects.
Protect
the
cord
and
power
adapters
from
liquids.
For
instance,
do
not
leave
your
cord
or
power
adapter
near
sinks,
tubs,
toilets,
or
on
floors
that
are
cleaned
with
liquid
cleansers.
Liquids
can
cause
a
short
circuit,
particularly
if
the
cord
or
power
adapter
has
been
stressed
by
misuse.
Liquids
can
also
cause
gradual
corrosion
of
the
power
cord
terminals
and/or
the
connector
terminals
on
the
adapter
which
can
eventually
result
in
overheating.
Always
connect
power
cords
and
signal
cables
in
the
correct
order
and
ensure
that
all
power
cord
connectors
are
securely
and
completely
plugged
into
receptacles.
Important
safety
information
vii