Hi Stefan. Yes it seems very lkely. It's just same as when I connect the camera without the FW.
No comms to FW via camera. I've checked the cable for continuity - all pins seem to be connected to the RJ12 so either problem inside camera or inside FW.........
My ZWO EFW (5 slot used with colour cam): plugged it in and it worked - end of story.......
Nick

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