The front panel light is controlled in the BIOS. Of the S0 state is on the light is solid (blue). S3 standby is primary color .25 seconds on, .25 seconds off indefinitely. Intel ready mode is Solid Secondary color. all these settings are changeable in the BIOS.
Anyway, that would be my suggestion of where to look first.
hangtown, the front panel blue light (slow orange blink when the unit is suspended) that you call CIR is in fact the power indicator.
it has moved from the power button being illuminated on the NUC5 to the front panel LED on the NUC6, where the button is not illuminated anymore.
The CIR receiver is sitting next to the blue led on the front panel but it is not visible from the outside.
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You can find more information about your NUC at the following link:
I hope this can help you.