LG Ultrafine 4k display not working
I just bought a new LG Ultrafine 4k monitor for my MacBook today. When I connect it to my Mac, it does work and everything is fine. But about 40 minutes later, when I try to use my display again, it just shows black screen, it does charge my phone, and you can feel it's warm, but it just doesn't charge my Mac and show anything on display anymore. Please can someone help me with this problem?