intel hd graphics 520

Hi, everyone! I have a Surface Book 1, 13-inch with Intel HD Graphics 520 since 2016 and by now I've bought a 4k display - Philips 276E8VJSB. I am connecting it through a brand new, 3-feet, miniDP to DP cable. I am using it in the "second screen only" option - but my issue seems to appear on...

Got Lenovo ideapad 300 laptop, intel hd graphics 520 and AMD R5 M330, win10 and second display LG 22mk600. Connected through HDMI cable. Everything was working just fine, I could use second display with my laptop. But suddenly my second monitor is not working, it says "out of range". No matter...