Replacing the power supply, Replacing, Power – Lenovo THINKCENTRE 6019 User Manual
Page 100: Supply
Replacing
the
power
supply
Attention
Never
remove
the
cover
on
a
power
supply
or
any
part
that
has
the
following
label
attached.
Hazardous
voltage,
current,
and
energy
levels
are
present
inside
any
component
that
has
this
label
attached.
There
are
no
servicable
parts
inside
these
components.
This
procedure
describes
how
to
remove
and
replace
the
power
supply.
1.
Remove
any
media
(diskettes,
CDs,
or
tapes)
from
the
drives,
shut
down
your
operating
system,
and
turn
off
all
attached
devices
and
the
computer.
2.
Unplug
all
power
cords
from
electrical
outlets.
3.
Disconnect
the
cables
attached
to
the
computer.
This
includes
power
cords,
input/output
(I/O)
cables,
and
any
other
cables
that
are
connected
to
the
computer.
See
and
4.
Remove
the
four
screws
at
the
rear
of
the
chassis
that
secure
the
power
supply.
5.
Open
the
computer
cover.
See
94
Hardware
Maintenance
Manual