Symptom-to-fru index, Error messages, Symptom-to-fru – Lenovo 3000 C100 User Manual
Page 39: Index, Error, Messages
Symptom-to-FRU
index
The
symptom-to-FRU
index
in
this
section
lists
symptoms
and
errors
and
their
possible
causes.
The
most
likely
cause
is
listed
first,
in
boldface
type.
Note:
Do
the
FRU
replacement
or
other
actions
in
the
sequence
shown
in
the
column
headed
“FRU
or
action,
in
sequence.”
If
replacing
a
FRU
does
not
solve
the
problem,
put
the
original
part
back
in
the
computer.
Do
not
replace
a
nondefective
FRU.
This
index
can
also
help
you
determine,
during
regular
servicing,
what
FRUs
are
likely
to
need
to
be
replaced
next.
If
no
error
message
is
displayed,
check
the
narrative
descriptions
of
symptoms.
If
the
symptom
is
not
described
there,
go
to
Note
For
a
device
not
supported
by
diagnostic
codes
in
the
Lenovo
3000
notebook
computers,
see
the
manual
for
that
device.
Error
messages
Symptom
or
error
FRU
or
action,
in
sequence
KEYBOARD
CONTROLLER
FAILURE
The
Keyboard
controller
failed
during
a
system
inquiry
about
connected
devices.
1.
System
board.
2.
Keyboard.
KEYBOARD
FAILURE
The
keyboard
fails
to
respond,
or
no
keyboard
is
connected.
1.
Keyboard.
2.
System
board.
CMOS
FAILURE
-
RUN
SCU
A
CMOS
data
error
has
occurred,
probably
because
of
a
loss
of
battery
power.
1.
System
board.
CMOS
CHECKSUM
INVALID
-
RUN
SCU
The
CMOS
checksum
error.
1.
System
board.
RAM
ERROR
AT
LOCATION
xxxxxx:
WROTE
:xxxx
READ
:xxxx
The
RAM
failed
during
a
memory
test
at
the
indicated
location.
1.
Reseat
DIMM.
If
the
problem
still
exists,
replace
the
DIMM.
2.
System
board.
PARITY
ERROR
AT
UNKNOWN
LOCATION
A
parity
error
occured
during
a
memory
test
at
an
unknown
location.
1.
Reseat
DIMM.
If
the
problem
still
exists,
replace
the
DIMM.
2.
System
board.
FAULTY
REFRESH
CIRCUIT
The
RAM
refresh
circuit
does
not
function
properly.
1.
Reseat
DIMM.
If
the
problem
still
exists,
replace
the
DIMM.
2.
System
board.
PARITY
ERROR
AT
LOCATION
xxxxxx
A
parity
error
occured
during
a
memory
test
at
the
location
specified.
1.
Reseat
DIMM.
If
the
problem
still
exists,
replace
the
DIMM.
2.
System
board.
NO
INTERRUPTS
FROM
TIMER
0
Timer
0
of
the
clock
timer
controller
does
not
generate
system
interrupts
correctly.
1.
System
board.
Symptom-to-FRU
index
Lenovo
3000
C100
35