Lenovo System x3750 M4 Installation And Service Manual page 181

Table 22. Light path diagnostics panel LEDs (continued)
• If a action step is preceded by (Trained service technician only), that step must be performed only by a trained
service technician.
LED Description
None, but An error has occurred and
the system cannot be isolated. The error
error LED is is not represented by a path.
lit.
PS A power supply has failed.
OVER SPEC The server is using more
power than the power
supplies can output.
PCI An error has occurred on a
PCI bus on the system board
or on the PCI riser-card.
An additional LED might be
lit on one of the PCI slots
on the system board or the
riser-card.
NMI A nonmaskable interrupt has
occurred.
CONFIG A hardware configuration
error has occurred.
Action
Use the Setup utility to check the system event log for information
about the error (see "Using the Setup utility" on page 134).
1. Check the power-supply in the server that has an lit yellow LED
(see "Power-supply LEDs" on page 170).
2. Make sure that the power supplies are seated correctly.
3. Remove one of the power supplies to isolate the failed power
supply.
4. Replace the failed power supply.
1. Install an additional power supply or change the input power
source from 110 V to 220 V.
2. Remove any recently installed options.
3. Restart the server to see whether the problem remains.
1. Check the IMM2 event log for information about the error.
2. Check the LEDs on the system board or PCI riser-card to identify
the component that caused the error.
3. If you cannot isolate the failing adapter by using the LEDs and the
information in the IMM2 event log, remove one adapter at a time
from the failing PCI bus; and restart the server after each adapter
is removed.
4. Replace the following components, in the order shown, restarting
the server each time:
• PCI riser-card
• (Trained service technician only) Replace the system board.
Check the IMM2 event log for information about the error.
1. If the CONFIG LED and the CPU LED are lit, complete the following
steps to correct the problem:
a. Check the microprocessors that were just installed to make
sure that they are compatible with each other (see "step 1"
on page 91 for additional information about microprocessor
requirements) and use the Setup utility and select System
Information > System Summary > Processor to verify the
microprocessors information.
b. (Trained service technician only) Replace the incompatible
microprocessor.
c. Check the IMM2 event logs for information about the error.
Replace any components that are identified in the error log.
2. If the CONFIG LED and the MEM LED are both lit, complete the
following steps:
a. Make sure that the DIMM configuration is supported
(see "Installing a memory module" on page 45 for DIMM
requirements and installation sequence information).
b. Replace the DIMMs with a supported configuration.
.
Chapter 4 Troubleshooting
167