Lenovo 63664DU Service Guide - Page 29

Computer, screen, problems

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Solving computer problems Problem: Solution: Problem: Solution: Problem: Solution: The computer does not return from standby mode, or the standby indicator stays on and the computer does not work. If the system does not return from standby mode, it may have entered standby or hibernation mode automatically because the battery is depleted. Check the standby indicator. v If the standby indicator is on, your computer is in standby mode. Connect the ac adapter to the computer; then press Fn. v If the standby 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 standby 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 not reset, remove the ac adapter and the battery. When you take action to return from standby mode, the computer display remains blank. Check whether an external monitor was disconnected or turned off while the computer was in standby mode. If you disconnected or turned off the external monitor, connect it or turn it on before resuming the computer from the standby mode. When resuming the computer from the standby 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. The computer enters standby mode unexpectedly. If the processor overheats, the computer automatically enters standby mode to allow the computer to cool and to protect the processor and other internal components. Also, check the settings for standby mode, using Power Manager. Computer screen problems Problem: Solution: Incorrect characters appear on the screen. Did you install the operating system or application program correctly? If they are installed and configured correctly, have the computer serviced. Chapter 3. Solving computer problems 21

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Problem:
The
computer
does
not
return
from
standby
mode,
or
the
standby
indicator
stays
on
and
the
computer
does
not
work.
Solution:
If
the
system
does
not
return
from
standby
mode,
it
may
have
entered
standby
or
hibernation
mode
automatically
because
the
battery
is
depleted.
Check
the
standby
indicator.
v
If
the
standby
indicator
is
on,
your
computer
is
in
standby
mode.
Connect
the
ac
adapter
to
the
computer;
then
press
Fn.
v
If
the
standby
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
standby
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
not
reset,
remove
the
ac
adapter
and
the
battery.
Problem:
When
you
take
action
to
return
from
standby
mode,
the
computer
display
remains
blank.
Solution:
Check
whether
an
external
monitor
was
disconnected
or
turned
off
while
the
computer
was
in
standby
mode.
If
you
disconnected
or
turned
off
the
external
monitor,
connect
it
or
turn
it
on
before
resuming
the
computer
from
the
standby
mode.
When
resuming
the
computer
from
the
standby
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
enters
standby
mode
unexpectedly.
Solution:
If
the
processor
overheats,
the
computer
automatically
enters
standby
mode
to
allow
the
computer
to
cool
and
to
protect
the
processor
and
other
internal
components.
Also,
check
the
settings
for
standby
mode,
using
Power
Manager.
Computer
screen
problems
Problem:
Incorrect
characters
appear
on
the
screen.
Solution:
Did
you
install
the
operating
system
or
application
program
correctly?
If
they
are
installed
and
configured
correctly,
have
the
computer
serviced.
Solving
computer
problems
Chapter
3.
Solving
computer
problems
21