5.
Exchange
the
following
parts
in
the
system
unit,
one
at
time.
After
exchanging
a
part,
reconnect
the
mainline
ac
power
cables
to
the
power
outlet
and
attempt
to
power
on
the
system.
If
the
system
powers
on,
the
FRU
you
exchanged
is
the
failing
item.
If
the
system
does
not
power
on,
exchange
the
next
part
in
the
list.
If
the
system
does
not
power
on
after
exchanging
all
the
FRUs
in
the
list,
ask
your
next
level
of
support
for
assistance.
a.
System
unit
control
panel
card
(see
symbolic
FRU
and
cables
b.
SPCN
card
(see
symbolic
FRU
c.
Power
supply
(see
symbolic
FRU
This
ends
the
procedure.
6.
Are
you
working
on
a
power
distribution
unit
with
tripped
breakers?
v
No
:
Continue
with
the
next
step.
v
Yes
:
Reset
the
tripped
power
distribution
breaker,
and
go
to
the
power
problem
procedure
for
the
unit
that
is
connected
to
the
tripped
breaker.
This
ends
the
procedure.
7.
Does
the
system
have
an
external
uninterruptible
power
supply
installed?
v
Yes
:
Continue
with
the
next
step.
v
No
:
Go
to
step
10
(See
page
.
8.
Use
a
multimeter
to
measure
the
ac
voltage
at
the
external
uninterruptible
power
supply
outlets.
Is
the
ac
voltage
from
200
V
ac
to
240
V
ac
or
from
100
V
ac
to
127
V
ac?
v
No
:
Continue
with
the
next
step.
v
Yes
:
Exchange
the
ac
power
jumper
cable
-
part
as
installed.
This
ends
the
procedure.
9.
DANGER
Dangerous
voltage
being
measured.
(RSFTD005)
Perform
the
following:
a.
Disconnect
the
mainline
ac
power
cables
from
the
external
uninterruptible
power
supply.
b.
Use
a
multimeter
to
measure
the
ac
voltage
at
the
external
uninterruptible
power
supply
end
of
the
mainline
ac
power
cables.
Is
the
ac
voltage
from
200
V
ac
to
240
V
ac
or
from
100
V
ac
to
127
V
ac?
v
No
:
Continue
with
the
next
step.
v
Yes
:
The
uninterruptible
power
supply
(UPS)
needs
service:
-
For
9910
type
UPS
Call
IBM
Service
Support.
For
all
other
UPS
call
the
UPS
provider.
Go
to
step
11
(See
page
to
verify
system.
10.
DANGER
Dangerous
voltage
being
measured.
(RSFTD005)
Perform
the
following:
a.
Disconnect
the
mainline
ac
power
cable
from
the
customer’s
ac
power
outlet.
b.
Use
a
multimeter
to
measure
the
ac
voltage
at
the
customer’s
ac
power
outlet.
Note:
Some
system
models
have
more
than
one
mainline
ac
power
cable.
For
these
models,
disconnect
all
the
mainline
ac
power
cables
and
measure
the
ac
voltage
at
all
ac
power
outlets
before
answering
the
following
question.
Is
the
ac
voltage
from
200
V
ac
to
240
V
ac
or
from
100
V
ac
to
127
V
ac?
v
Yes
:
Exchange
the
mainline
ac
power
cable.
Then,
go
to
step
1
(See
page
.
v
No
:
Inform
the
customer
that
the
ac
voltage
at
the
power
outlet
is
not
correct
and
reconnect
the
mainline
ac
power
cables
to
the
power
outlet
when
the
ac
voltage
at
the
power
outlet
is
correct.
This
ends
the
procedure.
Analyze
hardware
problems
33
