IBM x3100 M5 Type 5457, Installation And Service Manual

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3. Remove the server top cover and look inside the server for lit LEDs. Certain
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.
4. Look at the system service label inside the top cover of the server, which gives
an overview of internal components. This information can often provide
enough information to correct the error.
The following table describes the LEDs on the system board and suggested actions
to correct the detected problems.
Table 10. Suggested actions to correct the detected problem for each LED light
v
Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
v
If an action step is preceded by “(Trained technician only)”, that step must be performed only by a trained
technician.
v Go to the IBM support website at http://www.ibm.com/supportportal to check for technical information, hints,
tips, and new device drivers or to submit a request for information.
LED Description Action
DIMM error LEDs A memory DIMM has failed or is
incorrectly installed.
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 technician only) System
board
Microprocessor error LED Microprocessor has failed, is missing, or
has been incorrectly installed.
Note: (Trained service technician only)
Make sure that the microprocessor is
installed in the correct sequence; see
“Replacing the microprocessor and heat
sink” on page 304.
1. Check the system-event log to
determine the reason for the lit LED.
2. (Trained technician only) Reseat the
failing microprocessor.
3. Replace the following components one
at a time, in the order shown,
restarting the server each time:
a.
(Trained technician only) Failing
microprocessor
b. (Trained technician only) System
board
System-board error LED System-board CPU VRD and/or power
voltage regulators have failed. (Trained technician only) Replace the
system board.
IMM2 heartbeat LED Indicates the status of the boot process of
the IMM2.
When the server is connected to power
this LED flashes quickly to indicate that
the IMM2 code is loading. When the
loading is complete, the LED stops
flashing briefly and then flashes slowly to
indicate that the IMM2 if fully operational
and you can press the power-control
button to start the server.
If the LED does not begin flashing within
30 seconds of when the server is connected
to power, complete the following steps:
1. (Trained technician only) Recover the
firmware (see “Recovering the server
firmware (UEFI update failure)” on
page 161).
2. (Trained technician only) Replace the
system board.
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System x3100 M5 Type 5457: Installation and Service Guide