I wasn't sure when I got this monitor for the first 2 days because when it works the display is amazing but it flickered. My troubleshooting skills paid off. I think this monitor was returned due to the same behavior and I got the theft. Initially, the monitor flickered randomly. Sometimes it works for 15 minutes with no issues, while others flicker every 20 seconds. My setup consists of 4 components: monitor, video cable, Dell Eport plus II docking station, and then laptop(s). The docking station supports 4K and that's not a problem. I have 2 Dell Latitude and Precision laptops so it seems unlikely that they are the problem after I checked all the graphics card drivers. I found that my DisplapPort to HDMI cable is the problem. I switched to a DVI to HDMI cable and am very happy with the flicker free 4K 30Hz resolution. I had no issues with my previous Samsung 4K monitor and I hope this one is good too. The time will show. Refurbished monitor looks like new at a big discount. I'm happy!
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