Chapter 8 Removing and Replacing the Motherboard and Related Components 8-7
8.3 DIMMs
Caution – For maximum performance, the DIMMs in this system have been
specifically designed for it. Do not use DIMMs from a different system to upgrade or
replace the DIMMs in this system. Verify with your Sun sales or service
representative that the DIMMs you order have been Sun-certified for this system.
A failed DIMM can be identified by the address displayed in a memory failure error
message, or in POST. To identify a failed DIMM, see
TABLE 4-2.
Caution – DIMMs consist of electronic components that are extremely sensitive to
static electricity. Ordinary amounts of static electricity from clothing or work
environment can destroy the DIMM.
8.3.1 Removing a DIMM
Caution – Handle DIMMs only by the edges. Do not touch the DIMM components
or metal parts. Always wear an antistatic wrist strap when handling a DIMM.
1. Power off the system, remove the system cover, and attach an antistatic wrist strap
as described in Chapter 5.
Caution – Use proper ESD grounding techniques when handling components. Wear
an antistatic wrist strap and use an antistatic mat. Store ESD-sensitive components in
antistatic bags before placing them on any surface.
Note – Always remove and replace DIMMs in order, beginning with the DIMM
closest to the edge of the motherboard. See the physical connectors shown in
(FIGURE 8-4).
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