NOTE: When installing, hot swapping, or hot-adding a new PSU, wait for 15 seconds for the system to recognize thePSU and determine its status. The PSU redundancy may not occur until discovery is complete. Wait until the new PSUis discovered and enabled before you remove the other PSU. The PSU status indicator turns green to signify that thePSU is functioning properly.Figure 65. Installing an AC PSU1 release latch 2 PSU cable connector3 PSU 4 power connector5 PSU handleRelated linkSafety instructionsBefore working inside your systemAfter working inside your systemRemoving an AC power supply unitNon-redundant AC power supply unit (cabled)Your system supports a cabled non-redundant 450 W AC power supply unit (PSU).NOTE: When selecting or upgrading your system configuration, verify the system power consumption with the Dell Energy SmartSolution Advisor at Dell.com/ESSA to ensure optimum power utilization.Removing a non redundant AC power supply unit cabled)PrerequisitesCAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simplerepairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damagedue to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that areshipped with your product.1 Follow the safety guidelines listed in the Safety instructions section.2 Follow the procedure listed in the Before working inside your system section.3 Remove the cooling shroud.132 Installing and removing system components