Quote:
Originally Posted by kamocat
This either means there is a problem with your DB37 cable, or there is a problem with the image on the cRIO, or that the LED is burnt out...
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...or the DIO module is faulty, or not plugged in, or plugged in to the wrong slot...or the DB15 connector in Slot 4 of the cRIO is broken, or shorted by debris, or not making contact properly because of a foreign object...or the cRIO is broken...
At this point, it would probably be easiest to start swapping out components until you find one that makes things work.