Dell POWEREDGE C6105 - Manual (Page 196)

196 | Troubleshooting Your System
4 Turn off the system and attached peripherals, and disconnect the
system from its electrical outlet.
5 Remove the system-board assembly. See "Removing a System-Board
Assembly" on page 92.
6 Ensure that the controller card is firmly seated into the system board
connector. See "Installing the Expansion Card" on page 101.
7 If you have a battery-cached SAS RAID controller, ensure that the
RAID battery is properly connected and, if applicable, the memory
module on the RAID card is properly seated.
8 Ensure that the cables are firmly connected to the storage controller
and the SAS backplane board.
9 Install the system-board assembly. See "Installing a System-Board
Assembly" on page 93.
10 Reconnect the system to its electrical outlet, and turn on the system
and attached peripherals.
If the problem persists, see "Getting Help" on page 215.