Dataflash Indicators

I am rehabbing some well-used AF1000s in an install and have several units that when powered have solid "Power" and "DMX" LED indicators, but the "Status" LED is dark...which is supposed to mean no DMX.

However, one of the fixtures is looping out of a working fixture, and the other units are at positions with verified working DMX, they also all fire from a local tester, could this be bad DMX? or another issue?
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