IBM 7145, Installation And User Manual, Page: 34 / 136

AC power LED: Each hot-swap power supply has an ac power LED and a dc
power LED. When the ac power LED is lit, it indicates that sufficient power is
coming into the power supply through the power cord. During typical operation, both
the ac and dc power LEDs are lit. For any other combination of LEDs, see the
Problem Determination and Service Guide .
DC power LED: Each hot-swap power supply has a dc power LED and an ac
power LED. When the dc power LED is lit, it indicates that the power supply is
supplying sufficient dc power to the system. During typical operation, both the ac
and dc power LEDs are lit. For any other combination of LEDs, see the
Problem
Determination and Service Guide .
Error LED: When the power-supply error LED is lit, it indicates that the power
supply has failed. See the Problem Determination and Service Guide for detailed
information about power-supply errors.
QPI link LEDs 1 - 4: When the QuickPath Interconnect (QPI) link LEDs are lit, they
indicate that the QPI links are fully established.
Power-on LED: See “Operator information panel” on page 12 for the various states
of the power-on LED.
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.
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IBM System x3850 X5 and x3950 X5 Types 7145 and 7146: Installation and User’s Guide