Installing
or
replacing
a
memory
module
Attention
Do
not
open
your
computer
or
attempt
any
repair
before
reading
and
understanding
the
“Important
safety
information”
in
the
ThinkCentre
Safety
and
Warranty
Guide
that
came
with
your
computer.
To
obtain
a
copy
of
the
ThinkCentre
Safety
and
Warranty
Guide
,
go
to:
http://www.lenovo.com/support
This
section
provides
instructions
on
how
to
install
or
replace
a
memory
module.
Your
computer
has
two
slots
for
installing
or
replacing
DDR2
DIMMs
(double
data
rate
2
dual
inline
memory
modules)
that
provide
up
to
a
maximum
of
4
GB
system
memory.
When
installing
or
replacing
a
memory
module,
use
the
following
guidelines:
v
Use
1.8
V,
240-pin,
DDR2
DIMMs
(double
data
rate
2
dual
inline
memory
modules).
v
Use
512
MB,
1
GB,
or
2
GB
memory
modules
in
any
combination
up
to
a
maximum
of
4
GB.
Note:
Only
DDR2
SDRAM
DIMMs
can
be
used.
To
install
or
replace
a
memory
module:
1.
Open
the
computer
cover.
See
“Opening
the
computer
cover”
on
page
126.
2.
Pivot
the
drive
bay
assembly
upward
to
access
the
memory
slots.
See
“Accessing
the
system
board
components
and
drives”
on
page
127.
3.
Remove
any
parts
that
might
prevent
your
access
to
the
memory
slots.
4.
Locate
the
memory
slots.
5.
Open
the
retaining
clips.
Figure
44.
Opening
the
retaining
clips
130
Hardware
Maintenance
Manual
Summary of Contents for ThinkCentre 7522
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