Lenovo x3300 M4 7382 Installation And Service Manual page 269

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.
Step 1. Read the safety information that begins in "Safety" on page v and "Installation guidelines" on page
169.
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.
Step 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.
Step 3. Disconnect all external cables and power cords.
Step 4. Carefully turn the server on its side so that it is lying flat, with the cover facing up.
.
Chapter 6 Removing and replacing components
257