Lenovo Flex System EN4023, User Manual

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Introduction 25
Locating the information panel, LEDs, and external ports
2
FIGURE 15
System status LEDs
Table 7 identifies the three system LEDs. After POST is successfully completed, this is normal LED
behavior.
Table 8 identifies how the system status LEDs behave when certain conditions are met. During
POST, all LEDs are lit briefly. Certain error conditions will illuminate the amber Fault LED; for
example, if temperatures exceed normal parameters. In such circumstances, power will shut off.
1 Power LED 3 Fault LED
2 Location LED
TABLE 7
System status LEDs
LED icon LED name LED description
The left-most LED is the Power LED. When lit, it appears solid green.
The middle LED is the Location LED. When lit, it appears solid blue.
!
The right-most LED is the Fault LED. When lit, it appears solid amber.
TABLE 8
System status LEDs functionality
Condition Power LED (Green) Location LED (Blue) Fault LED (Amber) Comments
Pre POST Off Off Off Power off
POST start First 1-3 seconds on,
then blinking during
diagnostics and
initialization First 1-3 seconds on,
then off First 1-3 seconds on,
then off Lamp test progress indication
POST critical failure Off Off On Switch nonfunctional; replacement
required
POST noncritical failure On Off Off Switch operational in degraded mode
POST complete OK On Off Off Fully operational
Extended POST start On Off Off Switch operational in degraded mode