david Could I ask whether you are now using Cloudflare
That's only used on the forum, not on the board.
david It is on a pc at work and it has been working well but now does not come up. Could
Is this a Windows machine then? Do you see the BELABOOT drive in the file explorer and/or do you see a new ethernet network interface when you plug in the board? Allegedly on Windows you can run the following in a terminal and get some useful information about connected USB devices:
powershell "Get-PnpDevice -PresentOnly | Where-Object { $_.InstanceId -match '^USB' }"
otherwise you should be able to see them from the GUI if you open the Device Manager, select View->devices by connection and look under USB.