Unattended Power-On Indicator: This green LED
lights when the server powers on in the Unattended mode.
SCSI Hard Drive In-Use Indicator This amber LED
lights when your server is accessing a SCSI device. If this light
remains illuminated, this might indicate that either the SCSI bus or the
system microprocessor has stopped.
Secondary Microprocessor In-Use Indicator This amber LED
blinks to show the activity of a microprocessor installed in the secondary
microprocessor socket. The LED lights during POST to indicate the presence
of the microprocessor. When you install a secondary microprocessor, it
becomes the startup microprocessor.
Ethernet Receive Indicator This amber LED shows reception
activity on the network.
Security Indicator When tamper-detection software is
installed and enabled, this amber LED shows that a security hardware or
software error occurred.
Ethernet Link Status Indicator This green LED shows an
active link connection on the 10BASE-T interface.
Ethernet Transmit Indicator This amber LED shows
transmission activity on the network.
Primary Microprocessor Activity Indicator This amber LED
blinks to indicate the activity of the microprocessor, it also comes on during
POST.
POST Activity Indicator This amber LED lights while the
power-on self test (POST) and the configuration utility programs are
running. If this LED remains illuminated, either a POST error has
occurred, or the system microprocessor has stopped.
Power-On Indicator This green LED lights when you
turn on your server by pressing the power switch, and when the server
powers on in the Unattended mode.
Please see the LEGAL - Trademark notice.
Feel free - send a 
for any BUG on this page found - Thank you.