4-24 Sun Netra T5220 Server Service Manual • January 2012
Caution – Always perform antistatic measures by using a wrist strap and an
antistatic mat for handling and storing removable components.
Note – To remove and install some of the FB-DIMMs, you might need to remove and
reinstall the media bay assembly and cables. If this is necessary, see Section 3.3,
“Replacing the Media Bay Assembly” on page 3-8.
4.6.1 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 Section 1.4.4,
“Displaying System Faults” on page 1-21.
Use the FB-DIMM fault locator button on the motherboard to identify faulty
FB-DIMMs.
1. Prepare the server for FB-DIMM removal. See Section 4.1, “Powering Off and
Powering On the Server” on page 4-1.
2. Remove the FB-DIMM/CPU duct.
See Section 4.4.1, “Removing the Air Duct” on page 4-17.
3. Press the FB-DIMM fault locator button on the motherboard.
The button is located on the left edge of the motherboard, next to
/SYS/MB/CMP0/BR3/CH1/D1 (J1701).
4. Note 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.
4.6.2 Removing FB-DIMMs
1. Prepare the server for FB-DIMM removal. See Section 4.1, “Powering Off and
Powering On the Server” on page 4-1.
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