Replacing the heat sink, Replacing, Heat – Lenovo ThinkCentre A61e User Manual
Page 22: Sink, Removing, Battery, Installing

3.
Remove
the
old
battery.
4.
Install
the
new
battery.
5.
Replace
the
computer
cover,
and
connect
all
the
cables.
See
Note:
When
the
computer
is
turned
on
for
the
first
time
after
battery
replacement,
an
error
message
might
be
displayed.
This
is
normal
after
replacing
the
battery.
6.
Turn
on
the
computer
and
all
attached
devices.
7.
Use
the
Setup
Utility
program
to
set
the
date
and
time
and
any
passwords.
See
"Using
the
Setup
Utility"
in
your
User
Guide.
Replacing
the
heat
sink
Attention
Do
not
open
your
computer
or
attempt
any
repair
before
reading
the
“Important
safety
information”
in
the
Safety
and
Warranty
Guide
that
was
included
with
your
computer.
To
obtain
a
copy
of
the
Safety
and
Warranty
Guide,
go
to
the
Support
Web
site
at
http://www.lenovo.com/support.
This
section
provides
instructions
on
how
to
replace
the
heat
sink.
1.
Remove
the
computer
cover.
See
2.
Locate
the
heat
sink.
See
Figure
6.
Removing
the
battery
Figure
7.
Installing
the
battery
14
Hardware
Installation
and
Replacement
Guide