IBM x3400 7975 - Page 98

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 x3400 Types 7973, 7974, 7975 and 7976,” on page 87 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 shutoff due to +3.3V over voltage
1. Reseat the following components:
a. Hot-swap power supplies (if any are installed)
b. (Trained service technician only) Power-supply cables on
the system board
2.
(Trained service technician only) Replace the system board.
System shutoff due to +3.3V under voltage
1. Reseat the following components:
a. Hot-swap power supplies (if any are installed)
b. (Trained service technician only) Power-supply cables on
the system board
2.
(Trained service technician only) Replace the system board.
System shutoff due to 1.5V CPU over voltage
1. Reseat the following components:
a. Hot-swap power supplies (if any are installed)
b. (Trained service technician only) Power-supply cables on
the system board
2.
(Trained service technician only) Replace the system board.
System shutoff due to 1.5V CPU under voltage
1. Reseat the following components:
a. Hot-swap power supplies (if any are installed)
b. (Trained service technician only) Power-supply cables on
the system board
2.
(Trained service technician only) Replace the system board.
System shutoff due to board over temperature
1. Make sure that all fans have good airflow and are not
obstructed.
2. (Trained service technician only) Replace the system board.
System shutoff due to continuous +5v over
voltage
1. Reseat the following components:
a. Hot-swap power supplies (if any are installed)
b. (Trained service technician only) Power-supply cables on
the system board
2.
(Trained service technician only) Replace the system board.
System shutoff due to continuous +5v under
voltage
1. Reseat the following components:
a. Hot-swap power supplies (if any are installed)
b. (Trained service technician only) Power-supply cables on
the system board
2.
(Trained service technician only) Replace the system board.
System shutoff due to CPU over temperature
1. Make sure that the heat sink has good airflow and is not
obstructed.
2. Reseat the following components:
a. Heat sink cable
b. (Trained service technician only) Heat sink
80 System x3400 Types 7973, 7974, 7975, and 7976: Problem Determination and Service Guide