Dell PowerEdge 2550 - Manual (Page 63)

No. Go to step 3.
3. Refer to the documentation provided with the RAID controller software and check the software settings.
Is the problem resolved?
Yes. You have fixed the problem.
No. Go to step 4.
4. Turn off the system, including any attached peripherals, and disconnect the system from its electrical outlet.
5. Open the system doors (see " Opening the System Doors ").
6. Reseat the RAID memory module in its socket. See " Adding Memory " in "Installing System Board Options" for general instructions on removing and
replacing memory modules.
7. Reseat the RAID hardware key in its socket.
See Figure 8 -1 , "System Board Features," for the location of the RAID hardware key.
8. Close the system doors, reconnect the system to the electrical outlet, and reboot the system.
Is the problem resolved?
Yes. You have fixed the problem.
No. See " Getting Help " for instructions on obtaining technical assistance.
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WARNING: See "Protecting Against Electrostatic Discharge" in the safety instructions in your System Information document.