Chapter 4. Troubleshooting
27
Other problems
Your computer does not
respond.
•
To
turn
off
your
computer,
press
and
hold
the
Power
button
for
four
seconds
or
more.
If
the
computer
still
does
not
respond,
remove
the
AC
power
adapter.
•
Your
computer
might
lock
when
it
enters
sleep
mode
during
a
communication
operation.
Disable
the
sleep
timer
when
you
are
working
on
the
network.
The computer does not
start from a device you
want.
•
See
the
Boot
menu
of
the
BIOS
setup
utility.
Make
sure
that
the
BIOS
setup
utility
is
set
so
that
the
computer
starts
from
the
device
you
want.
•
Also
make
sure
that
the
device
from
which
the
computer
starts
is
enabled.
Make
sure
that
the
device
is
included
in
the
Boot
menu
in
the
BIOS
setup
utility
correctly.
•
While
turned
off,
press
the
Novo
button
to
select
the
device
you
want
the
computer
to
start
from.
The connected external
device does not work.
•
Do
not
connect
or
disconnect
any
external
device
cables
other
than
USB
while
the
computer
power
is
on.
Otherwise,
you
might
damage
your
computer.
•
When
using
high
power
consumption
external
devices
such
as
an
external
USB
optical
disk
drive,
use
an
external
device
power
adapter.
Otherwise,
the
device
may
not
be
recognized,
or
the
system
may
shut
down
as
a
result.
Summary of Contents for ideapad 720S
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