HP ProLiant DL385 G2 Server - Manual (Page 19)

Component identification 19
Status
On = AC power connected
Off = AC power disconnected
Battery pack LEDs
Item ID Color Description
1 Green System Power LED. This LED glows steadily when the
system is powered up and 12 V system power is
available. This power supply is used to maintain the
battery charge and provide supplementary power to the
cache microcontroller.