Could you please let us know the following;
- HDMI cable brand and model.
- Driver version installed. Please go to Device Manger> Display adapters> Intel(R) HD Graphics right click on Properties and then go to Driver, you will be able to see the version installed.
- Monitor model.
- BIOS version installed.
StarTech 1ft High Speed HDMI Cable - M/M, and a 3ft Startech HDMI
It had 10.18.15.4256 I upgraded it to 10.18.15.4279 just now so see if that helps
Acer V226HQL and G227HQL
SY0033 was on it and I upgraded to SY0036
Please install the latest driver version, Download Intel® Beta Graphics Driver for Windows® 7/8.1/10* [15.40]. In regard to the cable, I would recommend using HDMI cables 1.4b, see here for an example http://www.amazon.com/RuiLing-Performance-Supports-Ethernet-Blu-ray/dp/B00XC3GLVO/ref=sr_1_2?s=electronics&ie=UTF8&qid=1….