IBM System x3300 M4 Installation And Service Manual page 418

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 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 with one of these parts, contact a service
technician.
To replace a hot-swap power supply, complete the following steps:
Note: You must install the fan assembly before removing or installing the power
supply.
400
System x3300 M4 Type 7382: Installation and Service Guide
1. Read the safety information that begins in Safety and "Installation guidelines"
on page 36.
Attention: Static electricity that is released to internal server components
when the server is powered-on might cause the server to halt, which might
result in the loss of data. To avoid this potential problem, always use an
electrostatic-discharge wrist strap or other grounding system when you work
inside the server with the power on.
2. Turn off the server (see "Turning off the server" on page 24) and all attached
peripheral devices. Disconnect all power cords; then, disconnect all external
cables as necessary to replace the device.