Troubleshooting Your System 91b Open the system. See "Opening the System" on page 46.c Verify that the cable connections between the hard drive(s) and the drive controller are correct,whether the connections are to the SATA connectors on the system board, a SAS expansion card,or a SAS RAID controller.d Verify that the SAS or SATA cables are securely seated in their connectors.e Close the system. See "Closing the System" on page 47.f Reconnect the system to the electrical outlet, and turn on the system and attached peripherals.If the problem persists, see "Getting Help" on page 103.Troubleshooting Expansion CardsNOTE: When troubleshooting an expansion card, see the documentation for your operating system and theexpansion card.Problem• Error message indicates a problem with an expansion card.• Expansion card performs incorrectly or not at all.ActionCAUTION: Only trained service technicians are authorized to remove the system cover and access any of thecomponents inside the system. Before performing any procedure, see your Product Information Guide forcomplete information about safety precautions, working inside the computer and protecting against electrostaticdischarge.1 Run the appropriate online diagnostic test. See "Using Dell PowerEdge Diagnostics" on page 93.2 Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.3 Open the system. See "Opening the System" on page 46.4 Ensure that each expansion card is firmly seated in its connector. See "Installing an Expansion Card"on page 63.5 Close the system. See "Closing the System" on page 47.6 Reconnect the system to the electrical outlet, and turn on the system and attached peripherals.If the problem persists, go to the next step.7 Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.8 Open the system. See "Opening the System" on page 46.9 Remove all expansion cards installed in the system. See "Removing an Expansion Card" on page 65.10 Close the system. See "Closing the System" on page 47.11 Reconnect the system to the electrical outlet, and turn on the system and attached peripherals.