IBM x3400 7975 Problem Determination And Service Manual page 75

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.
Front
Power-supply
information
LEDs
panel
power-on
AC DC LED
Off Off Off
Lit Off Off
Lit Lit Off
Lit Lit Flashing
Lit Lit
Description
No power to the
server, or a problem
with the ac power
source.
DC source or power
supply power
problem.
Standby power
problem.
System power-on
problem.
Lit The power is good.
Action
1. Check the ac power to the server.
2. Make sure that the power cord is connected to a
functioning power source.
3. Remove one power supply at a time.
1. Make sure that the power supply is connected to the
power backplane.
2. Remove and replace one power supply at a time.
3. View the system-error log (see "Error logs" on page
22).
1. View the system-error log (see "Error logs" on page
22).
2. Remove one power supply at a time.
3. (Trained service technician only) Replace the power
backplane.
1. View the system-error log (see "Error logs" on page
22).
2. Make sure that the power cables are seated correctly.
3. Press the power-control button on the control-panel.
4. Remove the optional Remote Supervisor Adapter II
SlimLine, and try to turn on the server.
5. (Trained service technician only) Reseat the system
board.
6. (Trained service technician only) Replace the system
board.
No action is necessary.
57
Chapter 2. Diagnostics