3. Interface rails [A], NV-RAM [B], RAM-DIMM [C]
When installing the new controller board
Remove the NVRAM from the old controller board. Then install it on the new controller board after you
replace the controller board. Replace the NVRAM (* "NVRAM Replacement Procedure" in the
Appendices) if the NVRAM on the old controller board is defective.
• Make sure you print out the SMC reports (“SP Mode Data” and “Logging Data”) before you replace
the NVRAM.
• Keep NVRAMs away from any objects that can cause static electricity. Static electricity can damage
NVRAM data.
• Make sure the NVRAM is correctly installed on the controller board.
Electrical Components
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