IBM 6623 User Manual
Symptom
Suggested
action
The
monitor
has
screen
jitter,
or
the
screen
image
is
wavy,
unreadable,
rolling,
or
distorted.
If
the
monitor
self-tests
show
that
the
monitor
is
working
correctly,
consider
the
location
of
the
monitor.
Magnetic
fields
around
other
devices
(such
as
transformers,
appliances,
fluorescent
lights,
and
other
monitors)
can
cause
screen
jitter
or
wavy,
unreadable,
rolling,
or
distorted
screen
images.
If
this
happens,
complete
the
following
steps:
1.
Turn
off
the
monitor.
Attention:
Moving
a
color
monitor
while
it
is
turned
on
might
cause
screen
discoloration.
2.
Move
the
device
and
the
monitor
at
least
300
mm
(12
in.)
apart,
and
turn
on
the
monitor.
Notes:
1.
If
you
have
attached
a
diskette
drive
to
the
computer,
make
sure
that
the
distance
between
the
monitor
and
diskette
drive
is
at
least
75
mm
(3
in.)
to
prevent
diskette
drive
read/write
errors.
2.
Non-IBM
monitor
cables
might
cause
unpredictable
problems.
3.
An
enhanced
monitor
cable
with
additional
shielding
is
available
for
the
9521
and
9527
monitors.
For
information
about
the
enhanced
monitor
cable,
contact
your
IBM
marketing
representative
or
authorized
reseller.
If
the
problem
remains,
call
for
service.
Wrong
characters
appear
on
the
screen.
If
the
wrong
language
is
displayed,
update
the
BIOS
code
with
the
correct
language.
If
the
problem
remains,
call
for
service.
Power
problems
Symptom
Suggested
action
The
power-control
button
does
not
work,
and
the
reset
button,
if
supported,
does
work.
Call
for
service.
The
computer
does
not
turn
on.
v
Make
sure
that
the
power
cords
are
correctly
connected
to
the
computer.
v
Make
sure
that
the
electrical
outlet
functions
correctly.
v
Make
sure
that
the
type
of
memory
installed
is
correct.
v
If
you
just
installed
an
option,
remove
it,
and
restart
the
computer.
If
the
computer
now
turns
on,
you
might
have
installed
more
options
than
the
power
supply
supports.
If
the
problem
remains,
call
for
service.
The
computer
does
not
turn
off.
Determine
whether
you
are
using
an
ACPI
or
non-ACPI
operating
system.
If
you
are
using
a
non-ACPI
operating
system,
complete
the
following
steps:
1.
Press
Ctrl+Alt+Delete.
2.
Turn
off
the
computer
by
holding
the
power-control
button
for
4
seconds.
3.
If
the
computer
fails
during
POST
and
the
power-control
button
does
not
work,
remove
the
ac
power
cord.
If
the
problem
remains
or
if
you
are
using
an
ACPI
operating
system,
call
for
service.
64
IntelliStation
Z
Pro
Type
6223:
Installation
Guide