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Chapter
5.
Symptom-to-FRU
Index
Beep
symptoms
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Hard
disk
drive
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IBM
Enhanced
Diagnostic
error
codes
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POST
error
codes
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Undetermined
problems
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The
Symptom-to-FRU
index
lists
error
symptoms
and
possible
causes.
The
most
likely
cause
is
listed
first.
Always
begin
with
Chapter
2,
“General
information,”
on
page
3.
This
index
can
also
be
used
to
help
you
decide
which
FRUs
to
have
available
when
servicing
a
computer.
If
you
are
unable
to
correct
the
problem
using
this
index,
go
to
“Undetermined
problems”
on
page
56.
Important:
1.
Types
2179
and
6643
computers
come
up
quiet
(no
beep
and
no
memory
count
and
checkpoint
code
display)
when
no
errors
are
detected.
2.
Use
Beep
codes
and
the
IBM
Enhanced
Diagnostics
to
diagnose
and
fix
problems.
3.
The
processor
is
a
separate
FRU
from
the
system
board;
the
processor
is
not
included
with
the
system
board
FRU.
Beep
symptoms
Beep
symptoms
are
short
tones
or
a
series
of
short
tones
separated
by
pauses
(intervals
without
sound).
See
the
following
examples.
Beeps
Description
1-2-X
v
One
beep
v
A
pause
(or
break)
v
Two
beeps
v
A
pause
(or
break)
v
Any
number
of
breaks
4
Four
continuous
beeps
Use
the
following
table
to
diagnose
beep
symptoms.
Beep
Symptom
FRU/Action
1
Refresh
failure
1.
Run
IBM
Enhanced
Diagnostics
2.
Memory
module
3.
System
board
3
Base
64KB
memory
failure
1.
Memory
module
2.
System
board
4
Timer
not
operational
1.
Memory
module
2.
System
board
5
Processor
error
1.
Processor
2.
System
Board
6
8042-Gate
A20
failure
1.
System
Board
2.
Keyboard
©
Copyright
IBM
Corp.
2004
35