Hi Penman53
I’m assuming you’re using a GLD. If you go to the IO page ‘Monitor’ tab, you can set the port to ‘Aviom Mode’ or ‘ME-1 Mode’. In Aviom mode, the Monitors port Link/Error LED will not light up, you will only have 16 channels of audio to the ME-1, and you won’t get any channel names coming through to the ME-1. In ME-1 mode, you get the full 40 channels, as well as channel names. I think this is the most likely reason for the LED not coming on.
– Jeff, A&H