There I was, feeling smug this morning when my HDMI module arrived. I installed it according to an on line video and fired everything up. I'm using a Lilliput battery powered monitor for field use and the camera view came on line as promised. Only problem, my iPhone screen went dark apart from flight data and controls. I thought the module was meant to mirror the phone screen not replace it. I've tried a different lightning cable and rebooted everything. Any ideas on what I've done wrong (apart from the smugness - that goes without saying).