3 Follow the procedure listed in the After working inside your system section.Related linksSafety instructionsBefore working inside your systemInstalling the integrated storage controller cardInstalling the left or right expansion card riserInstalling an AC power supply unitInstalling the power supply unit blankAfter working inside your systemRemoving the power distribution boardPrerequisitesCAUTION: 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.Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructionsthat came with the 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 Keep the Phillips #2 screwdriver ready4 Remove the following:a Expansion card risers, if installedb Storage controller cardc AC power supply unit (PSU) or PSU blank, if installedd PSU bayNOTE: The Power Distribution Boards (PDBs) are located toward the back of the PSU bay.Steps1 Remove the screws securing the PDB to the PSU bay.2 Remove the PDB from the PSU bay.Installing and removing system components 151
