Unfortunately, the Dual Mirror function only works with a limited number of cell phones. My Nexus 5 is not one them to my disappointment.
You should check that your HDMI and USB cables are plugged in completely at the rear of the AV614BH. I routinely use the USB port to charge headphones.
The AV614BH is much better than what the manufacturers have been installing in the past.
That said, it does have it limitations. Despite its shortcomings. it has yet to irritate me to the point of laying out about $400 to replace it.
Bruce in NOLA
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