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## Locate a Faulty DIMM (DIMM Fault Remind Button)

This is cold-service procedure that can be performed by a customer.

Use the DIMM Fault Remind button to identify faulty DIMMs.

1. Consider your first steps:

   - Familiarize yourself with DIMM population rules.

     See About DIMMs.

   - Prepare the server for service.

     See Preparing for Service.

2. Swing the air duct up and forward to the fully open position.
3. Press the DIMM Remind button on the motherboard (callout 1 in the figure).

   This will cause an amber LED associated with the faulty DIMM to light for a few minutes.

4. Note the DIMM next to the illuminated LED.

   Figure 43 DIMM Fault LED locations

   Figure Legend

   1 Individual DIMM Fault LEDs

5. Ensure that all other DIMMs are seated correctly in their slots.

##### Related Information

- Locate a Faulty DIMM (`show faulty` Command)

- Remove a DIMM

- Install a DIMM

- Verify DIMM Functionality

- DIMM Configuration Error Messages

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