IBM System x3650 M3 4255 Service Manual page 246

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.
Note: The procedure below describes how to install a hot-swap ac power supply,
for instructions on how to install a hot-swap dc power supply, refer to the
documentation that comes with the dc power supply.
Attention:
power supply or power-supply filler for proper cooling.
To install a power supply, complete the following steps:
1. Slide the power supply into the bay until the retention latch clicks into place.
2. Connect the power cord for the new power supply to the power-cord connector
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IBM System x3650 M3 Types 4255, 7945, and 7949: Problem Determination and Service Guide
During normal operation, each power-supply bay must contain either a
Attention: Do not install 460-watt and 675-watt power supplies, high-efficiency
and non-high-efficiency power supplies, or ac and dc power supplies in the
server.
on the power supply.
The following illustration shows the power-cord connectors on the back of the
server.