You might get flicker on HDMI port. The picture on extended monitor is OK, then it goes black, then it come again and so forth. At times, it display OK for a long time, at other times it flickers to much and is too annoying.
How to fix it?
On Windows PC, right click on desktop, select Screen Resolution, select Monitor 2 ( the extended monitor), make sure the resolution is set to 1920 x 1080 (recommended). Click Advance Setting link. In this window click Monitor Tab, select refresh rate to 59. That should hopefully fix the flicker problem.