IBM x3550 - System - 7978, Problem Determination And Service Manual

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Exception: If there are multiple error codes or light path diagnostics LEDs that
indicate a microprocessor error, the error might be in the microprocessor or in the
microprocessor socket. See “Microprocessor problems” on page 128 for information
about diagnosing microprocessor 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 3, “Parts listing, Type 7978 and 1913 server,” on page 29 to determine which components are
CRUs and which components are FRUs.
v
If an action step is preceded by “(Trained service technician only),” that step must be performed only by a
trained service technician.
Beep code Description Action
No beep System board failure. (Trained service technician only) Replace the
system board.
1-1-2 Microprocessor register test failed.
1. (Trained service technician only) Reseat
the microprocessors.
2. (Trained service technician only) Replace
the following components one at a time, in
the order shown, restarting the server each
time:
a. Microprocessor 2 (if present).
b. Microprocessor 1.
1-1-3 CMOS write/read test failed.
1. Reseat the system board battery.
2. Clear CMOS. See “System-board switches
and jumpers” on page 11 for more
information about how to clear CMOS.
3. Replace the following components one at
a time, in the order shown, restarting the
server each time:
a. System-board battery
b. (Trained service technician only)
System board
1-1-4 BIOS EEPROM checksum failed.
1. Reload the server BIOS (see “Recovering
the BIOS code” on page 156).
2. (Trained service technician only) Replace
the system board.
1-2-1 Programmable interval timer failed. (Trained service technician only) Replace the
system board.
1-2-2 DMA initialization failed. (Trained service technician only) Replace the
system board.
1-2-3 DMA page register write/read failed. (Trained service technician only) Replace the
system board.
1-2-4 RAM refresh verification failed.
1. Reseat the DIMMs.
2. Replace the following components, one at
a time, in the order shown:
a. DIMMs
b. (Trained service technician only)
System board
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IBM System x3550 Type 7978 and 1913: Problem Determination and Service Guide