9If you have a SAS RAID controller daughter card, ensure that the following RAID components are properly installed and connected:

Memory module

Battery

10Verify that the cable connections between the SAS backplane(s) and the SAS controller daughter card are correct. See "Installing a SAS Controller Daughter Card" on page 70.

11Ensure that the cables are firmly connected to the SAS controller daughter card and the SAS backplane board.

12Close the system. See "Opening and Closing the System" on page 54.

13Reconnect the system to its electrical outlet, and turn on the system and attached peripherals. If the problem persists, proceed as follows:

If you have a SAS controller daughter card, see "Getting Help" on page 147.

If you have a SAS RAID controller daughter card, replace the SAS RAID daughter card battery. See "Installing a RAID Battery" on page 74. If replacing the battery does not solve the problem, see "Getting Help" on page 147.

Troubleshooting Expansion Cards

NOTE: When troubleshooting an expansion card, see the documentation for your operating system and the expansion card.

Problem

Error message indicates a problem with an expansion card.

Expansion card performs incorrectly or not at all.

Action

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer and protecting against electrostatic discharge.

1Run the appropriate online diagnostic test. See "Using the System Setup Program" on page 37.

2Open or remove the bezel. See "Front Bezel" on page 53.

3Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.

4Open the system. See "Opening and Closing the System" on page 54.

5Ensure that each expansion card is firmly seated in its connector. See"Installing an Expansion Card" on page 76.

6Close the system. See "Opening and Closing the System" on page 54.

Troubleshooting Your System

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Dell 2950 owner manual Troubleshooting Expansion Cards, 127