IBM X3950 X5 Problem Determination And Service Manual page 35

Table 4. QPI link LEDs (continued)
Link LEDs
Blinking
Locator LED: Use this LED to visually locate the server among other servers. You
can use IBM Systems Director to light this LED remotely.
In a two-node configuration, this LED is lit on the primary server and flashes on
the secondary server during POST.
You can press the locator button on the operator information panel on the front of
the server or use an IPMI command to turn this LED on or off.
System-error LED: When this LED is lit, it indicates that a system error has
occurred. An LED on the light path diagnostics panel is also lit to help isolate the
error. (See "Light path diagnostics panel" on page 15 for information about the
location and using the light path diagnostics panel.)
Power-on LED: See "Operator information panel" on page 14 for the various states
of the power-on LED.
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.
Table 5. Power-supply LEDs
Power-supply LEDs
AC DC Error
Off Off Off
Off Off On
Number of Nodes
1 to 4
Description Action
No ac power to
1. Check the ac power to the server.
either power
2. Make sure that the power cord is
supply or a
connected to a functioning power
problem with the
source and is securely connected to
ac power source
the server.
3. Turn the server off and then turn the
server back on.
4. Replace the power cord.
5. Check the power supply settings.
6. If the problem remains, replace the
power supply.
No ac power to
1. Replace the power supply.
the server or a
2. Make sure that the power cord is
problem with the
connected to a functioning power
ac power source
source.
and the power
supply had
detected an
internal problem
QPI wrap card or cable status
Server(s) operating at reduced
capacity
Notes
This is a normal
condition when no
ac power is present.
This happens only
when a second
power supply is
providing power to
the server.
Chapter 2. Introduction
19