Dell PowerEdge 6600 - Manual (Page 17)

Front-Panel Indicators and Features
Additional indicators are located behind the bezel for system power and hard drives. The CD and diskette drives have green activity indicators. The front-panel
LCD provides status information using an alphanumeric character display (see "
LCD Status Messages "). See Figure 2 -2 for the front-panel indicators and
features.
Figure 2-2. Front-Panel Features
Back-Panel Indicators and Features
Figure 2 -3 shows the back-panel features of the system.
Figure 2-3. Back-Panel Features
Indicator
Status Caution
Off Off Off No power is available to the system, or the system is not powered on.
On Off Blue The system is operating normally.
Off Blinking Amber blinking The system has detected an error and requires attention.
Blinking Off Blue blinking The system is identifying itself.
NOTE: Systems management software causes the status indicator to blink to identify a particular system. For more
information, see the systems management software documentation.