The 32MA70HY-P is a professional-grade monitor with a price tag that even an amateur could love. Troubleshooting-If the selected resolution is HDMI 1080i 60/50 Hz, the screen may be flickering. Change the resolution to the recommended resolution 1080P.
https://www.amazon.com/LG-32MA70HY-P-32-Inch-Monitor-Display/dp/B0755KJ56W

