Dell PowerEdge 1850 - Manual (Page 9)

Information Update
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6 Reconnect the system to the electrical outlet, and turn on the system and attached
peripherals.
If there is no memory-related error message, the problem is resolved.
If the problem persists, see "Getting Help" in your Installation and Troubleshooting Guide.
There are memory-related error messages in the SEL.
1 Enter the System Setup program and disable the Redundant Memory option, if applicable.
See "Using the System Setup Program" in your User's Guide.
2 Run the appropriate online diagnostic test. See "Using Server Administrator Diagnostics"
in your Installation and Troubleshooting Guide.
3 Replace the memory module(s) identified by the diagnostics. See "Installing Memory
Modules" in your Installation and Troubleshooting Guide.
4 Enter the System Setup program and enable the Redundant Memory option, if disabled
in step 1.
5 Restart the system. If there are still memory-related errors in the SEL, see "Getting Help"
in your Installation and Troubleshooting Guide.