Owners Manual

Installing a power supply unit
Prerequisites
1. Follow the safety guidelines listed in Safety instructions on page 23.
2. For systems that support redundant PSU, ensure that both the PSUs are of the same type and have the same maximum
output power.
NOTE: The maximum output power (shown in watts) is listed on the PSU label.
Steps
Slide the PSU into the system until the PSU is fully seated and the release latch snaps into place.
Figure 98. Installing a power supply unit
Next steps
1. Connect the power cable to the PSU, and plug the cable into a power outlet.
CAUTION: When connecting the power cable to the PSU, secure the cable to the PSU with the strap.
NOTE: When installing, hot swapping, or hot adding a new PSU, wait for 15 seconds for the system to recognize the
PSU and determine its status. The PSU redundancy may not occur until discovery is complete. Wait until the new PSU is
discovered and enabled before you remove the other PSU. The PSU status indicator turns green to signify that the PSU
is functioning properly.
System board
Removing the system board
Prerequisites
CAUTION:
If you are using the Trusted Platform Module (TPM) with an encryption key, you may be prompted to
create a recovery key during program or System Setup. Be sure to create and safely store this recovery key. If
you replace this system board, you must supply the recovery key when you restart your system or program
before you can access the encrypted data on your drives.
92 PowerEdge C4140 installing and removing system components