According to reports, you may experience the rift not showing a white indicator LED and no image in the rift with the core 2.0 update and latest Nvidia drivers.
A possible fix has been reported to work for people:
Delete the file C:\WINDOWS\System32\amd-vulkan64.json if it exists.
The most common correlation between the users with the issue is that at some point they had an AMD card in their system and the json file is interfering with the Vulkan drivers that Core 2.0 is now using.
A good idea is to use the DDU tool to completely wipe your drivers out and re-instal a fresh copy.
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