Lenovo a57 9702 Manual Suplementar
POST
error
codes
Each
time
you
power-on
the
system,
it
performs
a
series
of
tests
that
check
the
operation
of
the
system
and
some
options.
This
series
of
tests
is
called
the
Power-On
Self-Test,
or
POST.
POST
does
the
following
operations.
v
Checks
some
basic
system-board
operations
v
Checks
the
memory
operation
v
Starts
the
video
operation
v
Verifies
that
the
boot
drive
is
working
If
the
POST
detects
a
problem,
an
error
message
appears
on
the
screen.
A
single
problem
can
cause
several
error
messages
to
appear.
When
you
correct
the
cause
of
the
first
error
message,
the
other
error
messages
probably
will
not
appear
on
the
screen
the
next
time
you
turn
on
the
system.
POST
Error
Message
Description/Action
CMOS
battery
failed
The
CMOS
battery
is
no
longer
functional.
Replace
the
battery.
CMOS
checksum
error
-
defaults
loaded
Checksum
of
CMOS
is
incorrect.
The
computer
loads
the
default
configuration
settings.
This
error
might
indicate
that
CMOS
has
become
corrupt
due
to
a
weak
CMOS
battery.
CPU
at
nnnn
nnnn
is
the
running
speed
of
the
microprocessor.
Press
Esc
to
skip
memory
test
Pressing
Esc
skips
the
full
memory
test
HARD
DISK
INSTALL
FAILURE
Cannot
find
or
initialize
the
hard
disk
drive
controller
or
the
drive.
Make
sure
the
hard
disk
drive
is
correctly
installed.
If
no
hard
disk
drives
are
installed,
make
sure
the
hard
disk
drive
selection
in
Setup
is
set
to
NONE.
Keyboard
error
or
no
keyboard
present
Cannot
initialize
the
keyboard.
Make
sure
the
keyboard
is
properly
connected
to
the
computer
and
that
no
keys
are
held
pressed
during
POST.
To
purposely
configure
the
computer
without
a
keyboard,
set
the
error
halt
condition
in
Setup
to
HALT
ON
ALL,
BUT
KEYBOARD.
The
BIOS
then
ignores
the
missing
keyboard
during
POST.
Memory
Test:
This
message
displays
during
a
full
memory
test,
counting
down
the
memory
areas
being
tested.
Memory
test
fail
If
POST
detects
an
error
during
memory
testing,
additional
information
appears.
This
information
gives
specifics
about
the
type
and
location
of
the
memory
error.
Chapter
7.
Symptom-to-FRU
Index
79