IBM System x3100 M4 Type 2582 Problem Determination And Service Manual page 266

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: During normal operation, each power-supply bay must contain either a
power supply or power-supply filler for proper cooling.
To install a hot-swap power supply on the 5U server model with hot-swap power
supplies (Model name: 2582-F4x), complete the following steps.
1. Place the power supply into the bay guides.
2. Using the handle, push the power supply toward the front of the chassis until it
locks into place.
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IBM System x3100 M4 Type 2582: Problem Determination and Service Guide