IBM System x3755Types 7163, Problem Determination And Service Manual

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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 3, “Parts listing, System x3755 Type 8877 and 7163,” on page 25 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
system-information
LED also lit
Description Action
CPU A microprocessor/memory card has
failed, or a component on the card
has failed.
1. See the BMC log or the system-error log for the
source of the fault.
2. Find the failing, missing, or mismatched
microprocessor/memory card by checking the
LEDs on top of the card.
3. Remove the microprocessor/memory card with the
lit error LED on the top of the card; then, press the
light path diagnostics button on the
microprocessor/memory card to identify the failed
component. See “Removing a
microprocessor/memory card” on page 51.
4. Reseat the microprocessor/memory card. See
“Removing a microprocessor/memory card” on
page 51 and “Replacing a microprocessor/memory
card” on page 51.
5. Replace the microprocessor/memory card. See
“Removing a microprocessor/memory card” on
page 51 and “Replacing a microprocessor/memory
card” on page 51.
CNFG A microprocessor/memory card
configuration error has occurred.
1. See the BMC log or the system-error log for the
source of the fault.
2. Make sure that all microprocessors are the same
cache size and type.
3. Make sure that the microprocessor/memory cards
are installed in the correct sequence and that a
passthru card is correctly installed, if required.
MEM Memory failure.
1. Remove the microprocessor/memory card with the
lit error LED on the top of the card; then, press the
light path diagnostics button on the
microprocessor/memory card to identify the failed
DIMM. See “Removing a microprocessor/memory
card” on page 51.
2. Reseat the DIMM, see “Removing a DIMM” on
page 48 and “Replacing a DIMM” on page 49.
3. Replace the following components one at a time,
in the order shown, restarting the server each time:
a. DIMM, see “Removing a DIMM” on page 48
and “Replacing a DIMM” on page 49.
b. Microprocessor/memory card. See “Removing
a microprocessor/memory card” on page 51
and “Replacing a microprocessor/memory card”
on page 51.
Chapter 5. Diagnostics
115