IBM 7378, Problem Determination And Service Manual

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v Follow the suggested actions in the order in which they are listed in the Action column until the problem
is solved.
v
See the Chapter 4, “Parts listing, System x3400 M3 Types 7378 and 7379,” on page 141 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.
Lit light path diagnostics LED with the
system-error or information LED also lit
Description
System error (amber) When this LED is lit, it indicates that a system error has occurred. Use
the system service label to further isolate the error.
Chapter 3. Diagnostics
91