IBM 8863 User Manual - Page 73

Diagnosing, problems, using, light, diagnostics, Light, panel

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Press the reset button to reset the server and run the power-on self-test (POST). You might have to use a pen or the end of a straightened paper clip to press the button. The server is designed so that LEDs remain lit when the server is connected to an ac power source but is not turned on, provided that the power supply is operating correctly. This feature helps you to isolate the problem when the operating system is shut down. Any memory, microprocessor, and VRM LED can be lit again without ac power after you remove the microprocessor tray so that you can isolate a problem. After ac power has been removed from the server, power remains available to these LEDs for up to 24 hours. To view the memory, microprocessor, and VRM LEDs, press and hold the light-path-diagnostics button on the memory card, or microprocessor board to light the error LEDs. The LEDs that were lit while the server was running will be lit again while the button is pressed. Diagnosing problems using light path diagnostics LEDs in three locations on the server are available to help you diagnose problems that might occur during installation. Use them in the following order: 1. Operator information panel - Look at this panel first. If an error has occurred, the information LED or the system-error LED is lit. Important: If the server has a baseboard management controller, clear the BMC log and system-event log after you resolve all conditions. This will turn off the information LED and LOG LED, if all conditions are resolved. 2. Light path diagnostics panel - Move the latch on the right front of the operator information panel to access the light path diagnostics panel. Note any LEDs that are lit, and then close the panel. For LED locations, see the illustration on page 48. 3. LEDs inside the server - To identify the component that is causing the error, note the lit LED beside or on the component. Light path diagnostics panel The following table lists the LEDs on the light path diagnostics panel, the problems that they indicate, and actions to solve the problems. Chapter 6. Solving problems 61

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Press
the
reset
button
to
reset
the
server
and
run
the
power-on
self-test
(POST).
You
might
have
to
use
a
pen
or
the
end
of
a
straightened
paper
clip
to
press
the
button.
The
server
is
designed
so
that
LEDs
remain
lit
when
the
server
is
connected
to
an
ac
power
source
but
is
not
turned
on,
provided
that
the
power
supply
is
operating
correctly.
This
feature
helps
you
to
isolate
the
problem
when
the
operating
system
is
shut
down.
Any
memory,
microprocessor,
and
VRM
LED
can
be
lit
again
without
ac
power
after
you
remove
the
microprocessor
tray
so
that
you
can
isolate
a
problem.
After
ac
power
has
been
removed
from
the
server,
power
remains
available
to
these
LEDs
for
up
to
24
hours.
To
view
the
memory,
microprocessor,
and
VRM
LEDs,
press
and
hold
the
light-path-diagnostics
button
on
the
memory
card,
or
microprocessor
board
to
light
the
error
LEDs.
The
LEDs
that
were
lit
while
the
server
was
running
will
be
lit
again
while
the
button
is
pressed.
Diagnosing
problems
using
light
path
diagnostics
LEDs
in
three
locations
on
the
server
are
available
to
help
you
diagnose
problems
that
might
occur
during
installation.
Use
them
in
the
following
order:
1.
Operator
information
panel
-
Look
at
this
panel
first.
If
an
error
has
occurred,
the
information
LED
or
the
system-error
LED
is
lit.
Important:
If
the
server
has
a
baseboard
management
controller,
clear
the
BMC
log
and
system-event
log
after
you
resolve
all
conditions.
This
will
turn
off
the
information
LED
and
LOG
LED,
if
all
conditions
are
resolved.
2.
Light
path
diagnostics
panel
-
Move
the
latch
on
the
right
front
of
the
operator
information
panel
to
access
the
light
path
diagnostics
panel.
Note
any
LEDs
that
are
lit,
and
then
close
the
panel.
For
LED
locations,
see
the
illustration
on
page
48.
3.
LEDs
inside
the
server
-
To
identify
the
component
that
is
causing
the
error,
note
the
lit
LED
beside
or
on
the
component.
Light
path
diagnostics
panel
The
following
table
lists
the
LEDs
on
the
light
path
diagnostics
panel,
the
problems
that
they
indicate,
and
actions
to
solve
the
problems.
Chapter
6.
Solving
problems
61