Filter
Top Products
Level
2
Light
Path
LED
FRU/action
MEM
LED
on
(memory
error)
1.
Check
DIMM
error
LED
on
memory
board.
Note:
If
there
is
a
DIMM
failure,
an
LED
on
the
memory
board
indicates
the
failing
DIMM.
Reseat
the
failing
DIMMs,
re-enable
the
DIMMs
using
the
Configuration/Setup
Utility
program,
and
run
AMIDiag
to
pinpoint
the
failing
DIMM.
2.
DIMM.
3.
Memory
board.
DASD
LED
on
(hot-swap
hard
drive
failure)
Note:
If
RAID
system,
refer
to
the
Hardware
Maintenance
Manual
for
the
specific
RAID
adapter.
1.
Run
the
AMIDiag
program.
2.
Failing
drive
(reseat/replace).
3.
Be
sure
the
fans
are
operating
correctly
and
the
air
flow
is
good.
4.
SCSI
backplane.
PCI-X
BUS
LED
on
(adapter
failure)
1.
Check
the
system-error
log.
2.
If
there
is
a
PCI-X
slot
available,
move
the
adapter
to
an
empty
PCI-X
slot,
and
restart
the
server.
3.
Failing
adapter.
4.
PCI-X
board.
FAN
LED
on
(fan
failure)
Note:
A
failing
fan
can
also
cause
the
TEMP
and
DASD
LEDs
to
be
on.
1.
Check
individual
fan
LEDs.
2.
Replace
respective
fan.
3.
Front
fan
connectors.
4.
I/O
board.
TEMP
LED
on
(temperature
too
high)
1.
If
a
fan
LED
is
on,
replace
the
fan.
2.
Ambient
temperature
must
be
within
normal
operating
specifications.
See
“Features
and
specifications”
on
page
3.
3.
Examine
the
system-error
log.
a.
System
over
recommended
temperature
b.
Operator
information
panel
c.
DASD
over
recommended
temperature
—
overheating
hard
disk
drive.
d.
System
over
temperature
for
processor
x
(where
x
is
processor
number)
—
microprocessor
x.
e.
VRM
LED
on
—
failing
VRM.
f.
Power
supply
fault
/
over
temp
—
failing
power
supply
NMI
(nonmaskable
interrupt)
Note:
A
PCI
or
MEM
LED
may
also
be
on.
1.
See
the
system-error
log.
2.
If
a
PCI
LED
is
on,
follow
the
instructions
for
that
LED.
3.
If
a
MEM
LED
is
on,
follow
the
instructions
for
that
LED.
4.
Restart
the
server.
Board
LED
on
(system
monitor
detected
an
error
on
one
of
the
six
system
boards
(see
system
board
LEDs
1-6
for
additional
location
information)
1.
Turn
off
the
server
and
disconnect
the
ac
power
cord.
2.
Wait
at
least
10
seconds
before
plugging
in
the
ac
power
cord
again,
and
restart
the
server.
3.
Failed
system
board.
Event
Log
See
the
system-error
log.
PS1
LED
on
1.
Power
supply
1
2.
Top
power
board
3.
Midplane
board
PS2
LED
on
1.
Power
supply
2
2.
Top
power
board
3.
Midplane
board
148
IBM
xSeries
450
Type
8688:
Hardware
Maintenance
Manual
and
Troubleshooting
Guide