Hi there @Morry1988
Welcome back to our Community - sorry that you're having some issues with your additional V6 box currently.
It sounds like your box is not connected or communicating with our Network. You can check and try and force connection via these steps:
Home> Help&Settings> Settings> Network> Connect to Virgin Media Service Now
Now, the error code you have advised usually means that there is an issue with the WiFi connection between the box and the Hub. We even have a dedicated error code page where customers can check any error code and go through the self-care themselves if needed.
You advise that this particular box is connected via Ethernet to a Powerline; getting your error suggests that the Powerline is not picking up the signal and transferring to the box. Is the Powerline in a main socket rather than an extension cable? Have you tried another plug socket at all to see if that helps connect?
From locating your account from your forum information, we're only able to communicate to one of your boxes; one of which is showing that its in standby. When you get a moment, please do switch it on so we can have a quick check.
Have you tried connecting your 2nd box directly to the WiFi than via the Powerline? I have had a check on your Hub status too and all is looking great there at the time of writing. However, there are some issues showing with some devices that are connected.
3 devices are actually too close to the Hub and this is causing some issues with the bandwidth and could be slowing up other devices or cause connection issues. There are 2 devices that are showing to have long term connection issues; both of which are on the 2.4Ghz connection. These may need moving, rebooting or change of frequency depending on location. I'll leave some helpful WiFi links below for you that may assist.
WiFi Hints and Tips
WiFi Forum Help
Connecting to WiFI
Here are some helpful V6 guides too:
Multi-Room Streaming
V6 Userguide
That's a fair bit to get you going; pop back if you're still having issues.
Cheers