This is a recent problem I ran into with my new 7559. About a week ago I did a factory reset because the speakers were having a problem, and it worked fine for a couple days. Afterwards it would go into this flickering loop after it would wake up from sleep. This makes it so anytime I'm not using the laptop I basically have to shut it down, which really ***. I've posted a link of what the issue looks like. I ran the dell hardware test and my computer passed, and I also updated my drivers so I don't know what else to do. Thank you to anyone who can shed some light on what's happening.