4-2 Sun Fire X4150 Server Service Manual • November 2009
4.1 Servicing FB-DIMMs
This section describes how to diagnose and replace faulty FB-DIMMs (fully buffered
DIMMs). The following topics are covered:
■ “To Identify Faulty FB-DIMMs” on page 4-2
■ Section 4.1.1, “FB-DIMM Guidelines” on page 4-3
(Includes additional FB-DIMM information)
■ “To Remove FB-DIMMs” on page 4-7
■ “To Install FB-DIMMs” on page 4-8
■ “To Install Additional FB-DIMMs” on page 4-10
(How to upgrade the server with additional FB-DIMMs)
Note – This is a customer-replaceable unit.
Caution – This procedure requires that you handle components that are sensitive to
static discharge. This sensitivity can cause the component to fail. To avoid damage,
ensure that you follow antistatic practices as described in Section 2.7, “Performing
Electrostatic Discharge and Antistatic Prevention Measures” on page 2-8.
▼ To Identify Faulty FB-DIMMs
The Sun Fire X4150 Server Service Required LED is lit if the system detects a
FB-DIMM fault.
To use the rear panel Locator button to identify faulty FB-DIMMs:
1. Unplug all power cords from the rear panel.
2. Press the remind button (
FIGURE 4-1).
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