IBM x3250 M3 Problem Determination And Service Manual page 91
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Also See for x3250 M3:
- Installation and user manual (102 pages) ,
- Product manual (37 pages) ,
- Manual (32 pages)
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The server is designed so that LEDs remain lit when the server is connected to an
ac power source but is not turned on, provided that the power supply is operating
correctly. This feature helps you to isolate the problem when the operating system
is shut down.
Note: When you disconnect the power source from the server, you lose the ability
to view the LEDs because the LEDs are not lit when the power source is removed.
Before you disconnect the power source, make a note of which LEDs are lit,
including the LEDs that are lit on the operation information panel and LEDs inside
the server on the system board.
Many errors are first indicated by a lit system-error LED on the control-panel
assembly of the server. If this LED is lit, one or more LEDs elsewhere in the server
might also be lit and can direct you to the source of the error.
Before you work inside the server to view the LEDs, read the safety information that
begins on page vii and "Handling static-sensitive devices" on page 129.
If an error occurs, view the server LEDs in the following order:
1. Check the control-panel assembly on the front of the server. If the system-error
2. Check the front and rear of the server to determine whether any component
3. Remove the server cover and look inside the server for lit LEDs. Certain
The following table describes the LEDs on the system board and PCI extender
cards and suggested actions to correct the detected problems.
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 4, "Parts listing, System x3250 M3 Types 4251, 4252, and 4261," on page 119 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.
Component LED
Description
DIMM error LEDs
A memory DIMM has failed or is
incorrectly installed.
Fan error LEDs
A fan has failed, is operating too
slowly, or has been removed.
LED is lit, it indicates that an error has occurred.
LEDs are lit.
components inside the server have LEDs that will be lit to indicate the location
of a problem. For example, a DIMM error will light the LED next to the failing
DIMM on the system board.
Look at the system service label inside the side cover of the server, which gives
an overview of internal components. This information can often provide enough
information to correct the error.
Action
1. Remove the DIMM that has the lit error LED.
2. Reseat the DIMM.
3. Replace the following components one at a time,
in the order shown, restarting the server each time:
a. DIMM
b. (Trained service technician only) System board
1. Reseat the failing fan, which is indicated by a lit
LED near the fan connector on the system board.
2. Replace the failing fan.
73
Chapter 3. Diagnostics
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