Hi bob
Few things to check:
- your depthai version (best to keep it on latest)
- bootloader version of the device (same principle)
- ip assigned to your device (or fallback ip)
Since you can't connect to the device as per usual, you will have to connect through USB. Hold the button next to the usb connector and connect the device to a host. Then release the button and the device should boot up for USB connections.
Links:
https://docs.luxonis.com/projects/api/en/latest/components/bootloader/
https://docs.luxonis.com/projects/hardware/en/latest/pages/guides/getting-started-with-poe/#dhcp-and-static-ip
Thanks,
Jaka