I just got my RPi5 and can also confirm on LE 12.0.1 and denon AVR - no image on default 4K resolution. Sound present. Had to connect to TV directly, change to FullHD, and reconnect to AVR. Now ok. Kind regards.
In case of RPi5 2GB, read here:
Thread
[RPi5 2GB] Not Rendering LE 12.0.1
With the keyboard I can navigate somewhere, by guessing how the interface will look like. But there was no chance to connect this thing to the network for debugging.
How to reproduce
Steps to reproduce the behavior:- Flashing microSD card with Raspberry Pi Imager(on mac) or LibreELEC USB-SD Creator(on Windows).
- Plugging pi 5 to external monitor(with HDMI0), placing microSD card and power cable.
- Waiting to finish resizing a volume with automatic rebooting after 15 secs.
- See not fully rendered screen.
stalko