Hello, yesterday I got a brand new Medion Erazer P7643 notebook. It all worked great untill this morning when I was too late plugging in the charger and the screen went black so of course I plugged in the charger, awaiting the notebook to restart. But it didn't, so I tried to hold in the power button to shut it completely of to restart, but it won't shut off. The power button keeps glowing no matter how long I hold it. I've tried everything but it won't shut off but the screen keeps black. Thank you in advance if anyone could help me!