25.
The
test
indicated
that
there
was
no
signal
from
the
system.
Reconnect
the
cable
you
disconnected
and
perform
the
following:
a.
Exchange
the
following
parts:
1)
Twinaxial
workstation
IOA
card
2)
The
multi-adapter
bridge.
See
symbolic
FRU
b.
Power
on
the
system
to
perform
an
IPL.
This
ends
the
procedure.
26.
The
tester
is
in
the
self-test
mode.
Check
the
position
of
the
selector
switch:
v
If
the
selector
switch
is
not
in
the
left
(1)
position,
set
the
switch
to
the
left
(1)
position.
Then
go
to
step
24
(See
page
v
If
the
selector
switch
is
already
in
the
left
(1)
position,
the
port
tester
is
not
working
correctly.
Exchange
the
port
tester
and
go
to
step
23
(See
page
27.
The
cable
to
the
workstation
is
the
failing
item.
Cable
maintenance
is
a
customer
responsibility.
The
cable
must
be
repaired
or
exchanged.
For
information
on
correcting
cable
problems,
refer
to
the
page
in
the
Plan
for
hardware
and
software,
Planning
reference,
Cables
topic.
For
Cabling
instructions,
see
power
on
the
system
to
perform
an
IPL.
This
ends
the
procedure.
28.
The
port
tester
detects
most
problems,
but
it
does
not
always
detect
an
intermittent
problem
or
some
cable
impedance
problems.
The
tester
may
indicate
a
good
condition,
although
there
is
a
problem
with
the
workstation
IOP
card
or
cables.
a.
If
the
failing
display
is
connected
to
a
link
protocol
converter,
the
link
protocol
converter
is
the
failing
item.
See
the
link
protocol
converter
service
information
to
correct
the
problem.
b.
Exchange
the
following
parts:
1)
Console
2)
Twinaxial
workstation
IOA
3)
The
multi-adapter
bridge.
See
symbolic
FRU
4)
Cables
c.
If
you
have
another
working
display,
you
can
exchange
the
console
and
perform
an
IPL
to
attempt
to
correct
the
problem.
See
the
service
information
for
the
failing
display
for
more
information.
d.
If
exchanging
the
failing
items
did
not
correct
the
problem
and
the
reference
code
was
a
5002,
5082,
or
50FF,
there
may
be
a
Licensed
Internal
Code
problem.
Go
to
e.
The
problem
may
be
caused
by
devices
that
are
attached
after
the
console
on
port
0.
This
ends
the
procedure.
Workstation
adapter
PIP
For
use
by
authorized
service
providers.
This
topic
contains
the
procedure
necessary
to
isolate
a
failure
that
is
detected
by
the
workstation
adapter.
This
procedure
is
used
when
no
display
is
available
with
which
to
perform
on-line
problem
analysis.
The
workstation
adapter
detected
a
problem
while
communicating
with
the
workstation
that
is
used
as
the
primary
console.
Note:
If
you
are
using
a
PC,
you
must
install
an
emulation
program.
Read
all
safety
procedures
before
servicing
the
system.
Observe
all
safety
procedures
when
performing
a
procedure.
Unless
instructed
otherwise,
always
power
off
the
system
or
expansion
tower
where
the
FRU
is
located,
(see
before
removing,
exchanging,
or
installing
a
field-replaceable
unit
(FRU).
244
iSeries:
iSeries
Server
270,
800,
810,
820,
825,
830,
840,
870,
890,
SB2,
and
SB3
Hardware
Problem
Analysis
and
Isolation
