Lenovo 3000 N200 Notebook User Manual
Page 27
Problem:
The
computer
enters
sleep
mode
(the
sleep
indicator
turns
on)
immediately
after
Power-on
self-test
(POST).
Solution:
Make
sure
that:
v
The
battery
is
charged.
v
The
operating
temperature
is
within
the
acceptable
range.
See
If
the
battery
is
charged
and
the
temperature
is
within
range,
have
the
computer
serviced.
Problem:
The
critical
low-battery
error
message
appears,
and
the
computer
immediately
turns
off.
Solution:
The
battery
power
is
getting
low.
Connect
the
ac
adapter
to
the
computer,
or
replace
the
battery
with
a
fully
charged
one.
Problem:
When
you
take
action
to
return
from
sleep
mode,
the
computer
display
remains
blank.
Solution:
Check
whether
an
external
monitor
was
disconnected
or
turned
off
while
the
computer
was
in
sleep
mode.
If
you
disconnected
or
turned
off
the
external
monitor,
connect
it
or
turn
it
on
before
resuming
the
computer
from
the
sleep
mode.
When
resuming
the
computer
from
the
sleep
mode
without
attaching
the
external
monitor
or
turning
it
on,
and
the
computer
display
remains
blank,
press
Fn+F7
to
bring
up
the
computer
display.
Note:
If
you
use
the
Fn+F7
key
combination
to
apply
a
presentation
scheme,
press
Fn+F7
at
least
three
times
in
three
seconds,
and
the
image
is
displayed
on
the
computer
screen.
Problem:
The
computer
does
not
return
from
sleep
mode,
or
the
sleep
indicator
stays
on
and
the
computer
does
not
work.
Solution:
If
the
computer
does
not
return
from
sleep
mode,
it
may
have
entered
sleep
or
hibernation
mode
automatically
because
the
battery
is
depleted.
Check
the
sleep
indicator.
v
If
the
sleep
indicator
is
on,
your
computer
is
in
sleep
mode.
Connect
the
ac
adapter
to
the
computer;
then
press
any
key
or
the
power
button.
v
If
the
sleep
indicator
is
off,
your
computer
is
in
hibernation
mode
or
power-off
state.
Connect
the
ac
adapter
to
the
computer;
then
press
power
button
to
resume
operation.
If
the
system
still
does
not
return
from
sleep
mode,
your
system
may
stop
responding
and
you
cannot
turn
off
the
computer.
Reset
the
computer.
Unsaved
data
may
be
lost.
To
reset
the
computer,
press
and
hold
the
power
button
for
4
seconds
or
more.
If
the
computer
is
still
not
reset,
remove
the
ac
adapter
and
the
battery.
Solving
computer
problems
Chapter
3.
Solving
computer
problems
17