IBM 8671 Hardware Maintenance Manual - Page 46

Identifying, problems, using, status, Active, slots

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Identifying problems using status LEDs If the system-error LED in the operator information panel on the front of the server is on, one or more LEDs inside the server or on the power supplies will be on. Your server has LEDs to help you identify problems with some server components. These LEDs are part of the light path diagnostics feature built into the server. By following the path of LEDs, you can quickly identify the type of system error that occurred (see "Light path diagnostics" on page 38). Your server is designed so that any LEDs that are illuminated remain illuminated when the server shuts down, provided that the ac power source is good and the power supplies can supply +5 V dc current to the server. This feature helps you isolate the problem if an error causes the server to shut down. See "System-board LED locations" on page 53. LEDs for Active PCI slots Each Active (hot-plug) PCI slot has three LEDs associated with it: one power LED and two attention LEDs. The following illustration shows the location of these LEDs. PCI bus A error LED (CR66) PCI-X bus B error LED (CR68) PCI-X slot 5 power LED (CR75) PCI-X slot 5 internal attention LED (CR73) PCI-X slot 5 external attention LED (CR74) PCI-X bus C error LED (CR76) PCI-X slot 6 external attention LED (CR77) PCI-X slot 6 internal attention LED (CR78) PCI-X slot 6 power LED (CR79) Power LED This LED is on when the hot-plug PCI slot has power. An adapter must not be added to or removed from the PCI slot when the power LED is on. When this LED is off, the hot-plug PCI slot has no power applied. An adapter can be added to or removed from the PCI slot when the power LED is off. 36 xSeries 235 Type 8671: Hardware Maintenance Manual and Troubleshooting Guide

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Identifying
problems
using
status
LEDs
If
the
system-error
LED
in
the
operator
information
panel
on
the
front
of
the
server
is
on,
one
or
more
LEDs
inside
the
server
or
on
the
power
supplies
will
be
on.
Your
server
has
LEDs
to
help
you
identify
problems
with
some
server
components.
These
LEDs
are
part
of
the
light
path
diagnostics
feature
built
into
the
server.
By
following
the
path
of
LEDs,
you
can
quickly
identify
the
type
of
system
error
that
occurred
(see
“Light
path
diagnostics”
on
page
38).
Your
server
is
designed
so
that
any
LEDs
that
are
illuminated
remain
illuminated
when
the
server
shuts
down,
provided
that
the
ac
power
source
is
good
and
the
power
supplies
can
supply
+5
V
dc
current
to
the
server.
This
feature
helps
you
isolate
the
problem
if
an
error
causes
the
server
to
shut
down.
See
“System-board
LED
locations”
on
page
53.
LEDs
for
Active
PCI
slots
Each
Active
(hot-plug)
PCI
slot
has
three
LEDs
associated
with
it:
one
power
LED
and
two
attention
LEDs.
The
following
illustration
shows
the
location
of
these
LEDs.
PCI bus A error
LED (CR66)
PCI-X bus B error
LED (CR68)
PCI-X bus C error
LED (CR76)
PCI-X slot 5 power
LED (CR75)
PCI-X slot 6 power
LED (CR79)
PCI-X slot 5 internal
attention LED (CR73)
PCI-X slot 6 internal
attention LED (CR78)
PCI-X slot 5 external
attention LED (CR74)
PCI-X slot 6 external
attention LED (CR77)
Power
LED
This
LED
is
on
when
the
hot-plug
PCI
slot
has
power.
An
adapter
must
not
be
added
to
or
removed
from
the
PCI
slot
when
the
power
LED
is
on.
When
this
LED
is
off,
the
hot-plug
PCI
slot
has
no
power
applied.
An
adapter
can
be
added
to
or
removed
from
the
PCI
slot
when
the
power
LED
is
off.
36
xSeries
235
Type
8671:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide