No display on Rift after updating Nvidia drivers

Please help!

SteamVR wouldn't initialise this morning (was working fine Sunday - been away a few days). I opened the main oculus app which told me I HAD to update my Nvidia driver. I updated to 414.16 10/4/2018 for my GTX 1080. Now I run Unity and the head tracks fine in the editor but the controllers aren't working and the rift display is black!

Any ideas on what to check here? Really appreciate any responses - so much time wasted already :-(

 

Found a discussion today on SteamVR support

https://steamcommunity.com/app/250820/discussions/0/1728711392741722782/

Basic solution (for now) and what worked for me: You MUST have the Oculus Home app running before you launch your app in Unity or the Rift screen will be black!!!

Insane.