Vu+ DUO 4K SE audio problem with Sonos Playbar

And now a new and interesting problem. Yesterday our plug sockets tripped and whilst everything came back the VU Box now has a volume issue with my Sonos system. let me explain.

I am running a LG65 Inch Oled, which is connected to the 1st gen Sonos Playbar via optical. The TV is set for all audio to go through the optical and therefore through the Sonos and obviously the VU box is connected to the TV via HDMI. Now the problem is the volume of the Sonos as to be as high up as 90% to be able to to hear the VU Box. This seems to be only affected the VU because when I flip to my Apple TV or NVidia shield there is no such problem.

I think the problem first presented itself after the sockets tripping. I tried rebooting the VU and the Sonos playbar with no success. Any ideas?

Problem solved, the volume of the VU itself was down low. Mistake easily made since im using a Logitech harmony remote which adjusts the volume of the Sonos not of the VU.