Dell PowerEdge 750 - Manual (Page 46)

If the amount of memory installed does not match the system memory setting, then perform the following steps:
a. Turn off the system and attached peripherals, and disconnect the system from its electrical outlet.
b. Open the system. See " Opening the System ."
c. Swap the memory module in socket DIMM1_A with another of the same capacity. See " Installing Memory Modules " in "Installing System Options."
d. Close the system. See " Closing the System ."
9. Reconnect the system to its electrical outlet, and turn on the system and attached peripherals.
10. As the system boots, observe the monitor screen and the indicators on the keyboard.
11. Repeat step 8 through step 10 for each memory module installed.
If the problem persists, see " Getting Help ."
12. Run the system memory test in the system diagnostics. See " Running the System Diagnostics ."
If the test fails, see " Getting Help ."
Troubleshooting the Processor
Problem
l Error message indicates a processor problem.
l A heat sink is not installed for the processor.
Action
1. Run the appropriate online diagnostics test. See " Using Server Administrator Diagnostics " in "Running the System Diagnostics."
2. Open the system. See " Opening the System ."
3. Ensure that the processor and heat sink are properly installed. See " Replacing the Processor " in "Installing System Options."
4. Close the system. See " Closing the System ."
5. Run Quick Tests in the system diagnostics. See " Running the System Diagnostics ."
If the test fails, continue to the next step.
6. Open the system. See " Opening the System ."
7. Replace the processor. See " Replacing the Processor ."
8. Close the system. See " Closing the System ."
9. Run Quick Tests in the system diagnostics. See " Running the System Diagnostics ."
If the tests fail or the problem persists, see " Getting Help ."
Troubleshooting the System Board
Problem
NOTE: Several configurations for memory modules exist; see " Memory Module Installation Guidelines " in "Installing System Options."
CAUTION: See your System Information Guide for complete information about safety precautions, working inside the computer, and protecting
against electrostatic discharge.