IBM 306m - eServer xSeries - 8849, 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, Type 8849 or Type 8491 server,” on page 61 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.
System-error log message Action
System over recommended voltage on +2.5v.
1. Reseat the following components:
a. (Trained service technician only) System board
b. (Trained service technician only) Power supply
2. (Trained service technician only) Replace the system board.
System over recommended voltage on
continuous +5v.
1. Reseat the following components:
a. (Trained service technician only) System board
b. (Trained service technician only) Power supply
2. (Trained service technician only) Replace the system board.
System shutoff due to +1.5V CPU over voltage
1. Reseat the following components:
a. (Trained service technician only) Microprocessor
b. (Trained service technician only) System board
c. (Trained service technician only) Power supply
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. (Trained service technician only) System board
b. (Trained service technician only) Microprocessor
System shutoff due to +1.5V CPU under voltage
1. Reseat the following components:
a. (Trained service technician only) Microprocessor
b. (Trained service technician only) System board
c. (Trained service technician only) Power supply
2. Replace the following components one at a time, in the order
shown, restarting the server each time:
a. (Trained service technician only) System board
b. (Trained service technician only) Microprocessor
System shutoff due to +2.5v over voltage.
1. Reseat the following components:
a. (Trained service technician only) System board
b. (Trained service technician only) Power supply
2. (Trained service technician only) Replace the system board.
System shutoff due to +3.3V over voltage
1. Reseat the following components:
a. (Trained service technician only) System board
b. (Trained service technician only) Power supply
2. (Trained service technician only) Replace the system board.
System shutoff due to +3.3V under voltage
1. Reseat the following components:
a. (Trained service technician only) System board
b. (Trained service technician only) Power supply
2. (Trained service technician only) Replace the system board.
Chapter 2. Diagnostics
55