Try to reboot the server first
1. shutdown the server
2. disconnect the power cord for 10 seconds
3. connect the power and boot ther server.
If error persists, try to re-seat or replace the memory.
Inform user to try to do the following steps to solve the issue:
1. Replace the system memory on dimm2.
2. Depending on your support contract situation, and ability to bring down the machine, re-seating the module after cleaning it a bit with some good old 'canned air' may do the trick.
3. Swap the memory with another stick. This will help you determine whether it is a bad memory stick or a bad memory slot, and sometimes simply re-seating the memory can resolve connection-related issues. This will probably be asked of you by Dell support anyway.
4. If this has an older BIOS (less than 2.0.0), then it may also be a BIOS issue rather than hardware. Several BIOS revisions have been released to address memory and error handling.