Microprocessor 4
VRM connector
Microprocessor 3
VRM connector
Microprocessor card
error LED
Microprocessor 4 socket
Microprocessor 3 socket
Microprocessor 3 error LED
VRM 3 error LED
VRM 4 error LED
Microprocessor 4 error LED
Microprocessor 2
error LED
Microprocessor 1
error LED
Microprocessor 1
socket
Microprocessor 2
socket
Fan 4
Fan 8
Fan 3
Fan 7
Fan 6
Fan 2
Fan 5
Fan 1
Memory
card 1
Memory
card 2
Memory
card 3
Memory
card 4
Light path diagnostics
button
1
1
2
2
4
4
3
3
The
following
illustration
shows
the
LEDs
on
the
PCI-X
board.
PCI attention LEDs
PCI power LEDs
Power good LED
Remind
button
You
can
use
the
remind
button
on
the
light
path
diagnostics
panel
to
put
the
system-error
LED
on
the
operator
information
panel
into
Remind
mode.
When
you
press
the
remind
button,
you
acknowledge
the
error
but
indicate
that
you
will
not
take
immediate
action.
The
system-error
LED
flashes
while
it
is
in
Remind
mode
and
stays
in
Remind
mode
until
one
of
the
following
conditions
occurs:
v
All
known
errors
are
corrected.
v
The
server
is
restarted.
52
IBM
System
x3950
Type
8878
and
System
x3950
E
Type
8879:
Problem
Determination
and
Service
Guide
