There is a new LSPCON patch which suppose to fix a black screen issue.
Here's a new build if you wanna try it.
Gemini Lake users can use this build too. I updated Kodi and LE to a current master and added a missing patch that makes switching to HDR mode more consistent.
Hi, tested this build on NUC7i3BNH. LG OLED switches to HDR, and subtitles are bright as expected, but no video, black screen.