System ID/Reset Buttons
Part number 3501614,3501744

The System ID button and Server Reset button are located near the right edge of the front bezel. The System ID LED is located directly above the System ID button. The system ID button toggles the signal between the front panel ID LED and the motherboard ID LED.

System ID LED
ColorStateDescription
BlueONIdentify Active via button (The button has precedence over the command.)
BlueBlinkIdentify Active via a software command
OffOFFNo identification