Lenovo 5457 Installation And Service Manual page 261

7. Reconnect the external cables and power cords; then, turn on the attached devices and turn on the
server.
Removing the non-hot-swap power supply
This procedure applies only to 4U server models with non-hot-swap power supplies.
When you remove or install a fixed power supply, observe the following precautions.
Statement 8
CAUTION:
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 serviceable parts inside these components. If you suspect a problem with one
of these parts, contact a service technician.
To remove a non-hot-swap power supply on 4U server models with non-hot-swap power supplies, complete
the following steps.
1. Read the safety information in
2. Turn off the server and all attached devices; then, disconnect all power cords and external cables.
3. Carefully turn the server on its side so that it is lying flat, with the cover facing up.
Attention: Do not allow the server to fall over.
4. Remove the side cover (see
5. Remove the air baffle (see
6. Disconnect the hard disk power cables from the backplate.
7. Disconnect the cables from the power supply to the system board and all internal components. Note the
routing of all power-supply cables; you will need to route the power-supply cables the same way when
you install the power supply.
8. While you support the power supply, remove the six screws that secure it to the chassis; then, lift the
power supply out of the chassis. Save the screws to use when you install the replacement power supply.
Attention: It is important to support the power supply while you remove the mounting screws. After all
six screws are removed, the power supply is loose and can damage other components in the server.
"Safety" on page v and
"Removing the side cover" on page
"Removing the air baffle" on page
"Installation guidelines" on page
173).
177).
.
Chapter 6 Removing and replacing components
31.
249