v
Press
the
Fn+F12
keys.
v
If
you
are
using
the
APM
operating
system
and
have
set
the
mode
to
Power
switch
mode
[Hibernation]
,
turn
off
the
power
switch.
v
If
you
are
using
the
ACPI
operating
system
and
have
defined
one
of
the
following
actions
as
the
event
that
causes
the
system
to
go
into
hibernation
mode,
perform
that
action.
–
Closing
the
lid.
–
Pressing
the
power
button.
–
Pressing
Fn+F4
keys.
Also,
the
computer
goes
into
hibernation
mode
automatically
in
either
of
the
following
conditions:
v
If
a
“hibernation
time”
has
been
set
on
the
timer,
and
the
user
does
not
do
any
operation
with
the
keyboard,
the
TrackPoint,
the
hard
disk
drive,
the
parallel
connector,
or
the
diskette
drive
within
that
time.
v
If
the
timer
conditions
are
satisfied
in
suspend
mode.
v
If
you
are
using
the
APM
operating
system
and
have
set
the
mode
to
Hibernate
when
battery
becomes
low
,
and
the
battery
charge
becomes
critically
low.
When
the
power
is
turned
on,
the
computer
returns
from
hibernation
mode
and
resumes
operation.
The
hibernation
file
in
the
boot
record
on
the
hard
disk
drive
is
read,
and
system
status
is
restored
from
the
hard
disk
drive.
Checkout
guide
Use
the
following
procedures
as
a
guide
in
identifying
and
correcting
problems
with
the
ThinkPad
computer.
Note:
The
diagnostic
tests
are
intended
to
test
only
ThinkPad
products.
The
use
of
non-ThinkPad
products,
prototype
cards,
or
modified
options
can
lead
to
false
indications
of
errors
and
invalid
system
responses.
1.
Identify
the
failing
symptoms
in
as
much
detail
as
possible.
2.
Verify
the
symptoms.
Try
to
re-create
the
failure
by
running
the
diagnostic
test
or
by
repeating
the
operation.
Testing
the
computer
The
ThinkPad
computer
has
a
test
program
called
PC-Doctor
®
for
DOS
(hereafter
called
PC-Doctor
).
You
can
detect
errors
by
running
the
diagnostics
test
included
in
PC-Doctor.
This
section
is
an
overview
of
the
procedure.
For
details
that
depend
on
model-unique
functions,
refer
to
“Product
overview”
on
page
53.
Related
service
information
42
MT
2369/2370/2371/2372/2382/2386
Summary of Contents for 23717GU
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