Lenovo System x3300 M4 Installation And Service Manual page 261

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 fixed 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 163.
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 from the server.
Step 3. Unlock and remove the left side cover (see "Removing the left-side cover" on page 187).
Step 4. Remove the fan assembly (see "Removing the fan assembly" on page 39).
Step 5. Remove the air baffle (see "Removing the air baffle" on page 189).
Step 6. Remove the existing fixed power supply (see "Removing a fixed power supply" on page 244).
Step 7. Touch the static-protective package that contains the fixed power supply; then, remove the fixed
power supply from the package and place it on a static-protective surface.
Step 8. Put down the new fixed power supply into the position of the server correctly and tighten the 4
screws from the rear side of the server as the illustration showed.
.
Chapter 6 Removing and replacing components
247