Lenovo x3530 M4 Installation And Service Manual page 251

CAUTION:
The power control button on the device and the power switch on the power supply do not turn off
the electrical current supplied to the device. The device also might have more than one power
cord. To remove all electrical current from the device, ensure that all power cords are disconnected
from the power source.
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 the fixed power supply, complete the following steps:
Step 1. Read the safety information that begins in "Safety" on page v and "Installation guidelines" on
page 31.
Step 2. Turn off the server (see "Turning off the server" on page 22) and all attached peripheral devices.
Disconnect all power cords; then, disconnect all external cables as necessary to replace the device.
Step 3. Remove the top cover (see "Removing the server top cover" on page 33).
Step 4. Disconnect the power-supply cables from the connectors on the system board and internal
devices; then, disengage the cables from any cable clips.
Note: Note the routing of all power-supply cables; you will route the power-supply cables the
same way when you install the power supply.
.
Chapter 6 Removing and replacing structural parts
237