Locating a Faulty FB-DIMM

The system Service Required LED lights if the system detects a FB-DIMM fault.

Use the showfaults command to identify faulty FB-DIMMs. See Detecting Faults.

Use the FB-DIMM fault locator button on the motherboard to identify faulty FB‐DIMMs.

1. Prepare the server for FB-DIMM removal. See:
   • Power Off the Server
   • Disconnect Cables From the Server
   • Remove the Server From the Rack
   • Perform Antistatic Measures
   • Remove the Top Cover
   • Remove the Memory Air Duct
2. Disconnect all power cables from the server (Identifying an FB-DIMM).
3. Press the Fault Locator button on the motherboard to activate the FB-DIMM status LEDs (Identifying an FB-DIMM).

   Any faulty FB-DIMMs will be indicated with a corresponding amber fault LED on the motherboard.

   Figure 4-20  Identifying an FB-DIMM

   
   

   ---

   Tip  - Make a note of the faulty FB-DIMM location so that you can install the replacement FB-DIMM in the same location.

   ---

   ---

   Note - For memory configuration information see FB-DIMM Configuration Reference.

   ---

4. Document the location of faulty FB-DIMMs.

   Faulty FB-DIMMs are identified with a corresponding amber LED on the motherboard.

   ---

   Note - The FB-DIMM fault LEDs remain lit only for a few minutes.

   ---

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