Identify Faulty DIMMs

Before You Begin

• For information about using the DIMM test circuit, see About the DIMM and Processor Test Circuit .

1. Prepare the server module for service.

   See Preparing for Service .

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   Caution - Avoid component damage. Ensure that you follow electrostatic discharge safety measures and anti static practices. This procedure requires that you handle components that are sensitive to static discharge. This sensitivity can cause components to fail. See Performing ESD and Anti-static Prevention Measures.

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2. Verify that the charge status indicator is lit green.

   A lit green Charge Status indicator, located next to the Fault Remind button, indicates that the Fault Remind indicator circuit is working.

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   Note - The Charge Status indicator shows the test circuit power level. If the power in the circuit is depleted, the Charge Status and the Fault Remind indicators do not light. To recharge the circuit, insert the server module into a powered-on chassis.

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3. Press and hold the blue Fault Remind button on the motherboard (SW3001).
4. Note the location of the faulty DIMMs on the motherboard.

   A lit amber indicator next to a DIMM slot indicates a faulty DIMM.

   Indicator State DIMM Status Off Operating properly. On (amber) Faulty.

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

   If re-seating the DIMM does not fix the problem, remove and replace the faulty DIMM.

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   Note - The DIMM Fault indicator remains on when the Fault Remind button is pressed after the DIMM is re-seated. The server module must be powered up again to verify if re-seating fixes the DIMM problem.

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Next Steps

Remove DIMMs

See Also

• DIMM Population Rules and Guidelines

• About the DIMM and Processor Test Circuit