I have a Pioneer DMH-4660NEX car radio. I'm trying to get the HDMI source working with my iPhone. I've followed your videos and have just done the video bypass successfully. However, when I connect my iPhone to the HDMI source, it just shows a dark screen with some static. Could it be a bad cable (it's a new one), interference, other? The adapter is a genuine Apple part. Are there any recommended Micro HDMI to HDMI cables folks use with good success?

Firmware version: 3.0
Video bypass: enabled (Set On)

I also have a Maestro RR connected in my Ram 1500 truck.

Thanks very much for your help.

Cables
Micro HDMI to HDMI Cable 3ft, HDMI to Micro HDMI Adapter Cord Gold Plated Bi-Directional Compatible for Sport Camera Sony Nikon GoPro Hero
https://www.amazon.com/gp/product/B09VDCXSGX/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1

Apple Lightning to Digital AV Adapter
https://www.amazon.com/gp/product/B009WHV3BM/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1