Watchdog and Overtemperature Status LEDs
WD (green): Watchdog Status
TH (red/green): Overtemperature Status
Integral Ethernet LEDs
ACT (green): Ethernet Link/Activity
SPEED (green/orange/off): Ethernet Speed
General Purpose LEDs
LED0..3 (red/green/red+green): General Purpose/POST
Code
Note ...
If the General Purpose LEDs 0..3 are lit
red during boot-up, a failure is indicated
before the uEFI BIOS has started.