–
No:
Repeat
this
step.
–
Yes:
Install
all
parts
removed
in
this
procedure
and
go
to
This
ends
the
procedure.
v
No:
Exchange
the
last
I/O
device
you
disconnected
in
this
step.
See
the
for
the
model
you
are
working
on.
This
ends
the
procedure.
Instructions
for
Models
800
and
810
1.
If
the
system
has
logical
partitions,
perform
this
procedure
only
from
the
primary
partition’s
console
and
the
system
control
panel.
To
determine
if
the
system
has
logical
partitions,
go
to
before
continuing
with
this
procedure.
2.
Verify
that
your
system
unit
power
supply
is
functioning
properly:
a.
Disconnect
the
ac
power
cable
from
the
system
unit
you
are
working
on.
On
a
system
Model
800
or
810
with
FC
7116,
disconnect
both
the
system
unit
line
cord
and
the
expansion
unit
line
cord.
b.
Disconnect
all
of
the
connectors
from
the
power
supply.
c.
Reconnect
the
ac
power
cable(s).
d.
Using
an
appropriate
instrument,
push
and
hold
down
the
button
adjacent
to
the
LED
on
the
system
unit
power
supply.
Does
the
power
supply
(green)
LED
number
1,
next
to
the
switch
button,
blink
slowly
or
show
a
steady
green
light?
v
No:
Replace
the
power
supply.
See
symbolic
FRU
This
ends
the
procedure.
v
Yes:
The
power
supply
is
functioning
normally.
Continue
with
the
next
step.
3.
Perform
the
following:
a.
Disconnect
the
ac
power
cable
from
the
unit
you
are
working
on.
On
a
system
Model
800
or
810
with
an
FC
7116,
disconnect
both
the
system
unit
line
cord
and
the
expansion
unit
line
cord.
b.
Reconnect
the
connectors
to
your
power
supply
that
you
removed
in
the
previous
step.
c.
Disconnect
all
of
the
I/O
devices
(tape,
diskette,
optical,
and
disk
units)
by
sliding
them
partially
out
of
the
system
unit.
See
the
for
the
model
you
are
working
on.
d.
Remove
and
label
all
cards
that
are
installed
in
the
system
unit.
e.
Reconnect
the
ac
power
cable(s)
to
the
unit
you
are
working
on.
f.
Power
on
the
system.
Does
a
power
reference
code
occur?
v
No:
Go
to
step
7
(See
page
v
Yes:
Continue
with
the
next
step.
4.
Perform
the
following:
a.
Remove
one
of
the
AMDs
from
the
system
unit
that
was
not
previously
removed
during
this
procedure.
Disregard
an
AMD
SRC
if
it
occurs
during
this
step.
b.
Power
on
the
system.
Does
a
power
reference
code
occur?
v
No:
The
AMD
you
removed
in
this
step
is
the
failing
item.
This
ends
the
procedure.
v
Yes:
Continue
with
the
next
step.
5.
Have
you
removed
all
of
the
AMDs
one
at
a
time?
v
Yes:
Install
all
of
the
AMDs,
and
continue
with
the
next
step.
v
No:
Perform
the
following:
a.
Power
off
the
system.
156
iSeries:
iSeries
Server
270,
800,
810,
820,
825,
830,
840,
870,
890,
SB2,
and
SB3
Hardware
Problem
Analysis
and
Isolation
