Hi Brian,
Thank you for your reply!
I already tried it with powering seperatly and tried it again now.
I also have tried now 4 different cables, on 2 different computers.
When I uninstall the device and replug it, there is a message in the lower right corner like “RNDIS/Ethernet Gadget found” and some seconds later in the device Manager apears a “serial USB-Device (COM4)”
Yesterday I installed the Hypno1.7-PAL.img through Balena Etcher on the device and then I tested it by HDMI, everything is fine. But when pluged in, it’s not showing up as Network device as mentioned in the Video.
By the way, on: https://sleepycircuits.com/hypno-manual
under Firmware Update is still something written like “remove SD Card from Hypno”. I searched for a while for this card, till I saw the update instructions on the “Update” Page where it’s written correct.