Lenovo System x3750 M4 Installation And Service Manual page 260

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 a hot-swap power supply, complete the following steps:
Step 1. Read the safety information and installation guidelines, see "Safety" on page v and "Installation
guidelines" on page 38.
Step 2. If only one power supply is installed, turn off the server and peripheral devices and disconnect
all power cords.
Step 3. If the server is in a rack, at the back of the server, pull back the cable management arm to gain
access to the rear of the server and the power supply.
Step 4. Removing a 1400-watt hot-swap power supply.
a. Press and hold the orange release tab to the left. Grasp the handle and pull the power
supply out of the server.
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Lenovo System x3750 M4 Installation and Service Guide