IBM x3550 Problem Determination And Service Manual page 173

v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v See Chapter 3, "Parts listing, Type 7978 and 1913 server," on page 29 to determine which components are
customer replaceable units (CRU) and which components are field replaceable units (FRU).
v If an action step is preceded by "(Trained service technician only)," that step must be performed only by a
trained service technician.
Error code Description
405-xxx-a0n Failed Ethernet test on adapter in PCI slot
a.
Action
1. For a = 0, (trained service technician only)
replace the system board.
2. For a > 0,
a. Reseat the adapter in PCI slot a.
b. Replace the adapter in PCI slot a.
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Chapter 5. Diagnostics