Lenovo ThinkCentre M50 Hardware Maintenance Manual (HMM) - Page 63

Replacing, power, supply, Types

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Replacing the power supply Types 8185, 8186, 8192, 8413, and 8430 Before performing any removals or replacements, turn off the computer and peripheral devices and disconnect all external cables and power cords. To remove the power supply, do the following: 1. Turn off the computer and peripheral devices and disconnect all external cables and power cords; then, remove the cover. See "Removing the cover" on page 30. 2. Disconnect all power supply cables from the system board and the drives. See "Identifying parts on the system board (all machine types)" on page 38. 3. Remove the two screws that hold the power supply in place. 4. Lift the power supply out. To replace the power supply, do the following: 1. Install the new power supply and insert the two screws that hold the power supply in place. 2. Reconnect all power supply cables to the system board and the drives. See "Identifying parts on the system board (all machine types)" on page 38. 3. Go to "Replacing the cover and connecting the cables" on page 63. Types 8128, 8187, 8188, 8193, 8414, and 8431 Before performing any removals or replacements, turn off the computer and peripheral devices and disconnect all external cables and power cords. To remove the power supply, do the following: 1. Turn off the computer and peripheral devices and disconnect all external cables and power cords; then, remove the cover. See "Removing the cover" on page 30. 2. Disconnect all power supply cables from the system board and the drives. See "Identifying parts on the system board (all machine types)" on page 38. 3. Remove the four screws that hold the power supply in place. 4. Lift the power supply out. Chapter 6. Replacing FRUs 57

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Replacing
the
power
supply
Types
8185,
8186,
8192,
8413,
and
8430
Before
performing
any
removals
or
replacements,
turn
off
the
computer
and
peripheral
devices
and
disconnect
all
external
cables
and
power
cords.
To
remove
the
power
supply,
do
the
following:
1.
Turn
off
the
computer
and
peripheral
devices
and
disconnect
all
external
cables
and
power
cords;
then,
remove
the
cover.
See
“Removing
the
cover”
on
page
30.
2.
Disconnect
all
power
supply
cables
from
the
system
board
and
the
drives.
See
“Identifying
parts
on
the
system
board
(all
machine
types)”
on
page
38.
3.
Remove
the
two
screws
that
hold
the
power
supply
in
place.
4.
Lift
the
power
supply
out.
To
replace
the
power
supply,
do
the
following:
1.
Install
the
new
power
supply
and
insert
the
two
screws
that
hold
the
power
supply
in
place.
2.
Reconnect
all
power
supply
cables
to
the
system
board
and
the
drives.
See
“Identifying
parts
on
the
system
board
(all
machine
types)”
on
page
38.
3.
Go
to
“Replacing
the
cover
and
connecting
the
cables”
on
page
63.
Types
8128,
8187,
8188,
8193,
8414,
and
8431
Before
performing
any
removals
or
replacements,
turn
off
the
computer
and
peripheral
devices
and
disconnect
all
external
cables
and
power
cords.
To
remove
the
power
supply,
do
the
following:
1.
Turn
off
the
computer
and
peripheral
devices
and
disconnect
all
external
cables
and
power
cords;
then,
remove
the
cover.
See
“Removing
the
cover”
on
page
30.
2.
Disconnect
all
power
supply
cables
from
the
system
board
and
the
drives.
See
“Identifying
parts
on
the
system
board
(all
machine
types)”
on
page
38.
3.
Remove
the
four
screws
that
hold
the
power
supply
in
place.
4.
Lift
the
power
supply
out.
Chapter
6.
Replacing
FRUs
57