Troubleshooting cooling fansPrerequisitesCAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting andsimple repairs as authorized in your product documentation, or as directed by the online or telephone service andsupport team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and followthe safety instructions that are shipped with your product.NOTE: The fan number is referenced by the management software of the system. In the event of a problem with aparticular fan, you can easily identify and replace it by noting down the fan numbers on the cooling fan assembly.1. Follow the safety guidelines listed in the Safety instructions section.2. Follow the procedure listed in the Before working inside your system section.Steps1. Reseat the fan or the fan's power cable.2. Restart the system.Next steps1. Follow the procedure listed in the After working inside your system section.2. If the problem persists, see the Getting help section.Troubleshooting system memoryPrerequisitesCAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting andsimple repairs as authorized in your product documentation, or as directed by the online or telephone service andsupport team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and followthe safety instructions that are shipped with your product.NOTE: Memory slots are not hot-pluggable.NOTE: NVDIMM-N battery is not hot-pluggable.Steps1. If the system is operational, run the appropriate diagnostic test. See the Using system diagnostics section for the available diagnostictests.If the diagnostic tests indicate a fault, follow the corrective actions that are provided by the diagnostic tests.2. If the system is not operational, turn off the system and attached peripherals, and unplug the system from the power source. Wait atleast for 10 seconds, and then reconnect the system to the power source.3. Turn on the system and attached peripherals, and note the messages on the screen.If an error message is displayed indicating a fault with a specific memory module, go to step 12.4. Enter System Setup, and check the system memory setting. Make any changes to the memory settings, if needed.If the memory settings match the installed memory but the problem still persists, go to step 12.5. Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.6. Remove the system cover.7. Check the memory channels and ensure that they are populated correctly.NOTE: See the system event log or system messages for the location of the failed memory module. Reinstall thememory device.Troubleshooting your system 157
