IBM 8676 Hardware Maintenance Manual - Page 102

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Note: See "System" on page 112 to determine which components should be replaced by a field service technician. Monitor problems Symptom FRU/action Testing the monitor. v See the information that comes with the monitor for adjusting and testing instructions. (Some IBM monitors have their own self-tests.) The screen is blank. 1. Verify that: v The server power cord is plugged into the server and a working electrical outlet. v The monitor cables are connected properly. v The monitor is turned on and the Brightness and Contrast controls are adjusted correctly. v If the servers are C2T chained together, verify that: - The C2T chain cables are securely connected to the servers. - The C2T breakout cable is connected properly. - A server that is turned on is selected. Important: In some memory configurations, the 3-3-3 beep code might sound during POST followed by a blank display screen. If this occurs and the Boot Fail Count feature in the Start Options of the Configuration/Setup Utility program is set to Enabled (its default setting), you must restart the server three times to force the system BIOS to reset the CMOS values to the default configuration (memory connector or bank of connectors enabled). 2. If you have verified these items and the screen remains blank, replace: a. Monitor b. Video adapter, if installed c. System board Only the cursor appears. v See "Undetermined problems" on page 109. The monitor works when you turn on the server but goes blank when you start some application programs. 1. Verify that: v The application program is not setting a display mode higher than the capability of the monitor. v The primary monitor cable is connected to the C2T device breakout cable. v You installed the necessary device drivers for the applications. 2. If you have verified these items and the screen remains blank, replace the monitor. The screen is wavy, unreadable, 1. If the monitor self-tests show the monitor is working properly, consider rolling, distorted, or has screen the location of the monitor. Magnetic fields around other devices (such as jitter. transformers, appliances, fluorescent lights, and other monitors) can cause screen jitter or wavy, unreadable, rolling, or distorted screen images. If this happens, turn off the monitor. (Moving a color monitor while it is turned on might cause screen discoloration.) Then move the device and the monitor at least 305 mm (12 in.) apart. Turn on the monitor. Notes: a. To prevent diskette drive read/write errors, be sure the distance between monitors and diskette drives is at least 76 mm (3 in.). b. Non-IBM monitor cables might cause unpredictable problems. c. 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 reseller or IBM marketing representative. 2. Video adapter, if installed. 3. System board. 92 xSeries 335 Type 8676, Type 8830: Hardware Maintenance Manual and Troubleshooting Guide

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Note:
See
“System”
on
page
112
to
determine
which
components
should
be
replaced
by
a
field
service
technician.
Monitor
problems
Symptom
FRU/action
Testing
the
monitor.
v
See
the
information
that
comes
with
the
monitor
for
adjusting
and
testing
instructions.
(Some
IBM
monitors
have
their
own
self-tests.)
The
screen
is
blank.
1.
Verify
that:
v
The
server
power
cord
is
plugged
into
the
server
and
a
working
electrical
outlet.
v
The
monitor
cables
are
connected
properly.
v
The
monitor
is
turned
on
and
the
Brightness
and
Contrast
controls
are
adjusted
correctly.
v
If
the
servers
are
C2T
chained
together,
verify
that:
–
The
C2T
chain
cables
are
securely
connected
to
the
servers.
–
The
C2T
breakout
cable
is
connected
properly.
–
A
server
that
is
turned
on
is
selected.
Important:
In
some
memory
configurations,
the
3-3-3
beep
code
might
sound
during
POST
followed
by
a
blank
display
screen.
If
this
occurs
and
the
Boot
Fail
Count
feature
in
the
Start
Options
of
the
Configuration/Setup
Utility
program
is
set
to
Enabled
(its
default
setting),
you
must
restart
the
server
three
times
to
force
the
system
BIOS
to
reset
the
CMOS
values
to
the
default
configuration
(memory
connector
or
bank
of
connectors
enabled).
2.
If
you
have
verified
these
items
and
the
screen
remains
blank,
replace:
a.
Monitor
b.
Video
adapter,
if
installed
c.
System
board
Only
the
cursor
appears.
v
See
“Undetermined
problems”
on
page
109.
The
monitor
works
when
you
turn
on
the
server
but
goes
blank
when
you
start
some
application
programs.
1.
Verify
that:
v
The
application
program
is
not
setting
a
display
mode
higher
than
the
capability
of
the
monitor.
v
The
primary
monitor
cable
is
connected
to
the
C2T
device
breakout
cable.
v
You
installed
the
necessary
device
drivers
for
the
applications.
2.
If
you
have
verified
these
items
and
the
screen
remains
blank,
replace
the
monitor.
The
screen
is
wavy,
unreadable,
rolling,
distorted,
or
has
screen
jitter.
1.
If
the
monitor
self-tests
show
the
monitor
is
working
properly,
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,
turn
off
the
monitor.
(Moving
a
color
monitor
while
it
is
turned
on
might
cause
screen
discoloration.)
Then
move
the
device
and
the
monitor
at
least
305
mm
(12
in.)
apart.
Turn
on
the
monitor.
Notes:
a.
To
prevent
diskette
drive
read/write
errors,
be
sure
the
distance
between
monitors
and
diskette
drives
is
at
least
76
mm
(3
in.).
b.
Non-IBM
monitor
cables
might
cause
unpredictable
problems.
c.
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
reseller
or
IBM
marketing
representative.
2.
Video
adapter,
if
installed.
3.
System
board.
92
xSeries
335
Type
8676,
Type
8830:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide