0.
https://obsproject.com/forum/threads/laptop-black-screen-when-capturing-read-here-first.5965/
1. The Hardware-accelerated GPU scheduling ("HAGS") feature in Windows is currently known to cause performance and capture issues with OBS, games and overlay tools. It's an experimental feature and we recommend disabling it via
these instructions.
2. Your OBS version identifies itself as 'windows', which cannot be parsed as a valid OBS version number.
3. Run OBS as Administrator. Right click on the OBS shortcut, properties, advanced, check box, ok, apply, ok.
If streaming, be aware that Lenovo Vantage / Legion Edge is installed and is known to cause connection issues while streaming. Open Lenovo Vantage and set the "Network Boost" feature to disabled when streaming with OBS.