What if your Dell laptop won’t turn on but the power light is on? 3 methods are for you. Case 1: Dell Laptop Won’t Turn on Power Light Just Flashes So, what if your Dell laptop suddenly doesn’t turn on? In the following part, we will show you how to troubleshoot the issue based on different cases. PC is stuck at the Dell logo or hangs on the Windows logo screen.Laptop stuck at a black screen won't turn on.Dell laptop not turning on power light blinking.Some symptoms will appear, as shown below: Perhaps you used your Dell laptop that ran well yesterday but today when pressing the power button as usual, your Dell laptop fails to turn on or boot up.