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 Problem Determination and Service Guide on the IBM Documentation CD 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 locator (blue) Use this LED to visually locate the server among other servers. You
can use IBM Systems Director to light this LED remotely.
System information (amber) When this amber LED is lit, it indicates that information about a
suboptimal condition in the server is available in the IMM event log or
in the system-event log. Check the light path diagnostics panel for
more information.
System error (amber) When this LED is lit, it indicates that a system error has occurred. Use
the light path diagnostics panel and the system service label to further
isolate the error.
Light path diagnostics panel
The following illustration shows the front USB ports and the LEDs on the light path
diagnostics panel. The light path diagnostics panel is inside the front bezel.
The following table lists the light path diagnostics LEDs, the problems that they
indicate, and actions to solve the problems.
Chapter 2. Installing optional devices 29
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