Ring Floodlight Wired Plus not detecting motion, updating on dashboard or able to go live

So here’s one for you…I’ve got a Ring Pro Doorbell and a Ring Wired Floodlight Plus. Had them for 2 years, and never had a problem.Last week I realised the floodlight wasn’t notifying of any motion detections, and when I went into the app on the dashboard it was last updated 2 days ago. Couldn’t access Live view, either.I have reset the device, fully removed it from the network, reconnected it… when I do this, it works for about 5 minutes and then stops.I spoke to tech support who said it looked like the camera was trying to reboot itself constantly; the sent out a new one as I had extended warranty.I’ve just plugged in the new one, and it’s soo g the same thing!! I’ve reinstalled the App. It’s doing the same on Desktop view on my laptop.I’ve checked the wiring and all connected properly. In the app it says the floodlight camera is online with strong WiFi.I’m losing the plot. Any help or suggestions would be very welcome