I figured this may get lost in the other thread but I've made a new image to test your screen with. Turn brightness all the way up and open the attached photo. No need to save/set as wallpaper etc anymore. I encourage anyone that doesn't see this problem in normal use to not let it bother you if your screen flickers while viewing this image. This is only to confirm your suspicions about the scan lines if you can already see them and they're causing distress.