Servicing Dimms; Identifying Faulty Dimms - Oracle Sun Fire X4240 Service Manual

4.1

Servicing DIMMs

This section describes how to diagnose and replace faulty DDR2 (Double-Data Rate)
DIMMs . The following topics are covered:
Section 4.1.1, "Identifying Faulty DIMMs" on page 4-2
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Section 4.1.2, "DDR2 DIMM Guidelines" on page 4-4
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Section 4.1.3, "Removing DDR2 DIMMs" on page 4-7
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Section 4.1.4, "Installing DDR2 DIMMs" on page 4-8
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Section 4.1.5, "Installing Additional DDR2 DIMMs" on page 4-10
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Refer to the Sun Fire X4140, X4240, and X4440 Servers Diagnostics Guide for additional
DIMM troubleshooting information.
Note – CRU: This customer replaceable unit can be replaced by anyone.
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
Discharge Safety Measures" on page
4.1.1

Identifying Faulty DIMMs

The Sun Fire X4240 Service Required LED is lit if the system detects a DDR2 DIMM
fault.
To identify faulty DDR2 DIMMs:
1. Prepare the server for service.
a. Power off the server.
b. Disconnect the power cord (or cords) from the power supply (or supplies).
4-2 Sun Fire X4240 Server Service Manual • September 2010
Includes additional DDR2 DIMM information.
How to upgrade the server with additional DDR2 DIMMs.
See Section 2.5, "Powering Off the Server" on page
See Section 2.5, "Powering Off the Server" on page
Section 2.8.1, "Electrostatic
2-10.
2-4.
2-4.