It doesn't boot up anymore 😭If you check this forum you'll find advice regarding correct VDG connection, but if your system no longer boots up with the VDG lead disconnected, you may have burnt out some components on the motherboard, in which case it my have to be replaced.
https://forums.tomshardware.com/threads/where-do-i-plug-the-vdg-cable-on-this-motherboard.3693149/
https://forums.tomshardware.com/threads/where-do-i-plug-vdg-cable-in-my-motherboard.3725340/