Oracle X8-2L Service Manual page 129

See "Using the Server Fault Remind Button" on page
Failed DIMMs are identified with a corresponding amber LED on the motherboard.
If the DIMM Fault LED is off, then the DIMM is operating properly.
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If the DIMM Fault LED is on (amber), then the DIMM is failed and should be replaced [1].
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3. To remove the failed DIMM, do the following:
a. Rotate both DIMM slot ejectors outward as far as they will go.
The DIMM is partially ejected from the slot.
Identify and Remove a DIMM
127.
Servicing the DIMMs (CRU) 129