HP ProLiant DL385p Gen8 Server - Manual (Page 20)

Component identification 20
Status
On = AC power is connected.
Off = AC power is disconnected.
Missing = Riser cage is not installed, or power might not be
connected.
FBWC module LEDs (P222, P420, P421)
The FBWC module has three single-color LEDs (one amber and two green). The LEDs are duplicated on the
reverse side of the cache module to facilitate status viewing.