IBM System x3100 M4 Type 2582 Problem Determination And Service Manual page 264

When you remove or install a hot-swap power supply on the 5U server model with
hot-swap power supplies (Model name: 2582-F4x), observe the following
precautions.
Statement 5:
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 server top 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.
Attention:
hot-swap power supply or a hot-swap power-supply filler for proper cooling.
To remove a hot-swap power supply on server models with hot-swap power
supplies (5U chassis), complete the following steps.
1. Read the safety information that begins on page vii and "Installation guidelines"
2. Disconnect the power cord from the power supply that is to be removed.
3. Press down on the orange release lever and pull the power supply out of the
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IBM System x3100 M4 Type 2582: Problem Determination and Service Guide
During normal operation, each power-supply bay must contain either a
on page 163.
bay, using the handle.