I have a Samsung 28" U28E590 4K Display and a 13" MacBook Pro with Touch Bar (Intel Iris 550 1536 MB Graphics). I have a dongle for HDMI output.
The problem is that the external monitor flickers, displays white noise and sometimes cuts out completely. I've tried SMC reset and buying a new HDMI cable, but the issue persists.
How do I resolve the issue?