The following illustration shows the locations of the power-supply LEDs.
AC
DC
!
AC power LED
(green)
DC power LED
(green)
Error LED
(amber)
The following table describes the problems that are indicated by various
combinations of the power-supply LEDs and the power-on LED on the operator
information panel and suggested actions to correct the detected 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 4, “Parts listing, Types 7145, 7146, 7143, and 7191,” on page 81 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.
Power-supply LEDs
Operator
information
panel
power-on
LED Description ActionAC DC Error
Off Off Off Off No ac power to the
server, or a problem
with the ac power
source.
1. Check the ac power to the server.
2. Make sure that the power cord is connected to a
functioning power source.
3. Make sure that the power cord is fully seated in
the power-supply inlet.
On Off Off Off DC source power
problem or system
error.
1. Reseat one power supply at a time (see
“Removing a hot-swap power supply” on page
123 and “Replacing the hot-swap power supply”
on page 127).
2. View the system-event log (see “Event logs” on
page 38).
On On Off Off The server is turned
off or standby
power problem.
1. Press the power-control button on the operator
information panel.
2. View the system-error log (see “Event logs” on
page 38).
3. Remove one power supply at a time (see
“Removing a hot-swap power supply” on page
123 and “Replacing the hot-swap power supply”
on page 127).
On On Off Flashing Normal standby
state.
No action.
70 IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Problem Determination and Service Guide
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