Artesyn SCP-P4040-4G-ENP2 Installation and Use (August 2014) - Manual (Page 28)

Controls, LEDs, and Connectors
SCP-P4040-4G-ENP2 Installation and Use (6806800P60B) 28
3.2 On Board LEDs
There are several LEDs provided on the module to denote the statements of the system.
The following table lists the LED IDs:
Table 3-2 LED and statements of the system
LED ID Statement of the system
D17 Thermal issue
D18~D19 Debug LED 1~2
D3 System asleep
D7 DDR3 power OK
D4 3.3V power OK
D5 2.5V power OK
D6 1.8V power OK
D13 CORE power OK
D9 PLATFORM power OK
D10 1.5V power OK
D1 USB hub 1 active
D2 USB hub 1 high speed
D15 USB hub 2 active
D16 USB hub 2 high speed