CAUTION: The cooling fans are hot-pluggable. To maintain proper cooling while the system is on, only replace one fan at a time.

3Ensure that the faulty fan's power cable is firmly attached to the fan power connector. For a hot-plug fan, remove and reseat the fan. See "Cooling Fans" on page 65.

NOTE: Wait 30 seconds for the system to recognize the fan and determine whether it is working properly.

4If the problem is not resolved, install a new fan. See "Cooling Fans" on page 65.

If the replacement fan is working properly, close the system. See "Closing the System" on page 47. If the replacement fan does not operate, see "Getting Help" on page 121.

Troubleshooting System Memory

Problem

•Faulty memory module.•Faulty system board.•Front-panel diagnostic lights indicate a problem with system memory.

Action

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. Before performing any procedure, see your Product Information Guide for complete information about safety precautions, working inside the computer and protecting against electrostatic discharge.

1Run the appropriate online diagnostic test. See "Using Dell PowerEdge Diagnostics" on page 111.

2Turn on the system and attached peripherals.

If an error message does not appear, continue to the next step. If an error messages appears, go to step 10.

3Enter the System Setup program and check the system memory setting. See "Using the System Setup Program" on page 29.

If the amount of memory installed matches the system memory setting, go to step 10.

4Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.

5Open the system. See "Opening the System" on page 43.

6Reseat the memory modules in their sockets. See "Installing Memory Modules" on page 76.

7Close the system. See "Closing the System" on page 47.

8Reconnect the system to its electrical outlet, and turn on the system and attached peripherals.

100Troubleshooting Your System