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5
Troubleshooting and Repair
72
Removing the CPM board cover
The
CPM
cooling
shroud
consists
of
the
main
board
cover.
The
entire
cover
is
attached
to
the
board
with
a
number
of
flat
Phillips
head
screws.
Perform
the
following
steps
to
remove
the
CPM
main
board
cover:
1. Power
down
the
CPM
or
activate
the
hot
swap
switch
so
it
can
safely
be
uninstalled.
2. Remove
the
CPM
from
its
slot
and
set
it
on
an
ESD
‐
safe
work
surface
as
described
in
Removing
the
CPM
on
page 71.
3. Remove
the
six
screws
securing
the
board
cover
to
the
board
standoffs
and
set
them
aside.
4. Remove
the
board
cover
and
set
it
aside.
Installing the CPM board cover
Perform
the
following
steps
to
install
the
CPM
main
board
cover:
1. Align
the
board
cover
so
the
countersunk
screw
holes
are
aligned
with
the
board
standoffs.
2. Attach
the
board
cover
using
six
flat
‐
head
Phillips
screws.
Installing the CPM
The
replacement
CPM
should
already
be
on
a
static
‐
free
surface.
Perform
the
following
steps
to
install
the
replacement
RTM
or
CPM.
1. Read
Electrostatic
discharge
on
page 10
and
make
sure
you
are
adequately
grounded
before
handling
any
of
the
modules.
2. Pick
up
the
CPM.
3. Hold
the
ejector
latches
in
the
open
position
and
slide
the
module
all
the
way
into
the
shelf,
making
sure
it
makes
a
solid
connection
with
the
backplane
and
the
EMC
gasket
forms
a
tight
seal.
4. When
the
ejector
latches
reach
the
latch
rail
on
the
shelf,
close
both
ejector
latches
and
tighten
the
thumbscrews.
5. When
a
CPM
is
installed
in
a
shelf
with
power
applied,
the
blue
hot
swap
LED
flashes
until
the
module
is
active,
then
turns
off.
6. For
more
information
on
installing
a
CPM,
see
the
ATCA
‐
4xxx
Compute
Processing
Module
Installation
Guide.
7. Remove
the
grounding
wrist
strap
when
you
are
done
handling
the
module.