Hey, Recently my external monitor (Asus MX239H) started displaying these strange color lines. I'm using it with my 2011 13'' MacBook Air. I connected the monitor with a mini display -> hdmi cable. So not with a adapter. I bought the cable from DX when I got the monitor about 2 months ago. I've added a few photos from some youtube vids to display the lines. It was hard to get a right picture because they disappear quickly. This also happens when scrolling down the page. When I move the open vid to my MacBook's screen, the lines don't appear. I've googled around and found that recalibrating it might help, but It still didn't fix the problem. Restarting the monitor helps, but the lines also randomly appear after some time. Any ideas what this might be? The cable? The monitor? And how to fix it. I don't think its the laptop because there are no problems when using it's screen. Thanks in advance.