IBM Eserver xSeries 360 Type 8686, User Reference Manual

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Chapter 5. Installing options
77
If the DIMM LED is not visible with the memory board in place, after
removing the memory board you can press the Test button on the board to
relight the failing DIMM’s LED. If no DIMM has failed, pressing the Test
button lights the Test LED.
3. Remove the memory board as shown in the following illustration:
Attention: When you handle Electrostatic Discharge-Sensitive devices (ESD),
take precautions to avoid damage from static electricity. For details on handling
these devices, see “Handling static-sensitive devices” on page 52.
a. Lift up the two memory-board locking latches to release the board.
b. Lift the memory board out of the server.
4. When installing additional DIMMs, determine the DIMM slots into which you will
install them. You must populate the slots in pairs, one DIMM in each column,
proceeding from top to bottom. Use only 2.5 V, 184-pin, PC1600, DDR registered
synchronous dynamic random-access memory (SDRAM) with error correcting
code (ECC).
DIMM 1 LED (CR22)
DIMM 3 LED (CR20)
DIMM 5 LED (CR18)
DIMM 7 LED (CR16)
DIMM 2 LED (CR23)
DIMM 4 LED (CR21)
DIMM 6 LED (CR19)
DIMM 8 LED (CR17)
Memory board
LED (CR24) Memory board VRM LED
(CR12)
Test LED to show
capacitor is charged
Test button