b.
System
unit
backplane
in
location
MB1
This
ends
the
procedure.
4.
This
is
a
Model
820.
See
Replace
the
following
FRUs
in
order
one
at
a
time
until
the
problem
is
resolved.
Be
sure
to
IPL
in
SLOW
OVERRIDE
mode
after
each
replacement.
a.
Processor
card
in
location
M03
b.
System
unit
backplane
in
location
MB1
This
ends
the
procedure.
5.
This
is
a
Model
825.
Replace
the
System
unit
backplane
in
location
CB1.
See
for
part
number
and
remove
and
replace
information.
Be
sure
to
IPL
in
SLOW
OVERRIDE
mode
after
the
replacement.
This
ends
the
procedure
6.
Is
this
system
a
Model
830,
SB2
system
unit
and
FC
9074?
v
Yes
:
See
Replace
the
following
FRUs
in
order
one
at
a
time
until
the
problem
is
resolved.
See
the
Be
sure
to
IPL
in
SLOW
OVERRIDE
mode
after
each
replacement.
a.
Clock
card
in
location
M06A
in
the
830
system
unit.
b.
JTAG
cable
c.
Processor
regulator
card
in
location
M01
This
ends
the
procedure.
v
No
:
This
is
a
Model
840,
SB3
system
unit
and
FC
9079
base
I/O
tower.
See
Replace
the
following
FRUs
in
order
one
at
a
time
until
the
problem
is
resolved.
See
the
Be
sure
to
IPL
in
SLOW
OVERRIDE
mode
after
each
replacement.
a.
Clock
card
in
location
M19
in
the
840
system
unit
b.
JTAG
cable
c.
Regulator
card
in
location
M04
in
the
840
system
unit
d.
Regulator
card
in
location
M07
in
the
840
system
unit
This
ends
the
procedure.
7.
This
is
a
Model
870
or
890
unit
with
processor
and
FC
9094
base
I/O
tower.
Replace
the
following
FRUs
in
order
one
at
a
time
until
the
problem
is
resolved.
See
and
view
the
FRU
locations
and
failing
components
table
for
locations
and
remove
and
replace
procedure
links.
Be
sure
to
IPL
in
SLOW
OVERRIDE
mode
after
each
replacement.
a.
Card
in
location
M41
in
the
Model
870
or
890
system
unit
b.
JTAG
cable
This
ends
the
procedure.
CMPRES1
For
use
by
authorized
service
providers.
The
compressed
device
and
the
compression
IOA
are
not
compatible.
CRYPBAT
For
use
by
authorized
service
providers.
The
batteries
for
the
IBM
(R)
4758
cryptographic
adapter
card
need
to
be
replaced.
Attention:
If
you
remove
any
of
the
batteries
without
first
backing
up
the
power
with
a
fresh
battery,
the
data
in
the
card’s
protected
memory
could
be
lost,
which
would
render
the
4758
Adapter
card
useless
and
require
replacement
of
the
4758
Adapter
card.
Because
the
4758-023
Adapter
card
contains
4
batteries,
and
the
Battery
Replacement
Kit
contains
only
2
batteries,
DO
NOT
attempt
to
remove
or
replace
batteries
unless
you
have
two
Battery
Replacement
Kits
(see
).
(Individual
Analyze
hardware
problems
321