I bought a Lenovo C315 for my in-laws, and they are now struggling with an odd display issue. Often, when coming out of sleep, the screen is completely black. If you hit the button next to the power button, the screen flashes, and it appears the computer is running just fine (login screen displays briefly, then returns to a black screen). If you repeat this 20 or so times, the screen finally stays lit, and the machine runs flawlessly. I tried searching for some odd display setting, but found nothing out of the ordinary. Has anyone else seen this problem?