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 Action
I9990650 AC power has been restored.
1. Check the power cables.
2. Check for interruption of the ac power supply.
120 IBM System x3550 Type 7978 and 1913: Problem Determination and Service Guide
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