3.
Remove
the
server
cover
and
look
inside
the
server
for
lit
LEDs.
Certain
components
inside
the
server
have
LEDs
that
will
be
lit
to
indicate
the
location
of
a
problem.
For
example,
a
VRM
error
will
light
the
LED
next
to
the
failing
VRM
on
the
microprocessor
tray.
The
following
illustration
shows
the
LEDs
and
connectors
on
the
microprocessor
tray.
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
Chapter
2.
Diagnostics
63
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