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Chapter 4
Troubleshooting Procedures
4-7
6. After you finish testing the power supply, remove the wrist strap, replace the
system cover, and power on the system as described in Chapter 10.
4.5
DIMM Failure
At times, the operating environment, diagnostic program, or POST might not
display a DIMM location (U number) as part of a memory error message. In this
situation, the only available information is a physical memory address and failing
byte (or bit). The following table lists physical memory addresses that can be used to
locate a defective DIMM.
18
-5V
-5 VDC
19
+5V
+5 VDC
20
+5V
+5 VDC
TABLE 4-3
DIMM Physical Memory Address
DIMM Slot
DIMM Pair
(non-interleave)
DIMM0
DIMM1
00000000 - 0fffffff
DIMM2
DIMM3
10000000 - 1fffffff
TABLE 4-2
Power Supply Connector J17 Pin Assignments (Continued)
Pin
Signal
Description
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