Lenovo 5457 Installation And Service Manual page 130

Table 10. Suggested actions to correct the detected problem for each LED light
• Follow the suggested actions in the order in which they are listed in the Action column until the problem is
solved.
• If an action step is preceded by "(Trained technician only)", that step must be performed only by a trained
technician.
• Go to the Lenovo support website at
tips, and new device drivers or to submit a request for information.
LED
DIMM error LEDs
Microprocessor error LED
System-board error LED
IMM2 heartbeat LED
RTMM heartbeat LED
Lenovo System x3100 M5 Installation and Service Guide
118
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Description
A memory DIMM has failed or is incorrectly
installed.
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 293.
System-board CPU VRD and/or power
voltage regulators have failed.
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.
Power-on and power-off sequencing.
to check for technical information, hints,
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 technician only) System
board
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
(Trained technician only) Replace the
system board.
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 150).
2. (Trained technician only) Replace the
system board.
1. If the LED flashes at 1Hz, it is
functioning properly and no action is
necessary.
2. (Trained technician only) If the LED is
not flashing, replace the system board.