Try tapping F8 or F5 as the Laptop starts to get into safe mode.See if it starts that way.
Try removing the Battery and power cord.Holsd down the Start button for 50 seconds.Plug in the power cord again and try without the battery.
Best phone camera 2017
Stunning new film posters by Hattie Stewart, Joe Cruz & more
iPad Pro 10.5in (2017) review
28 astuces pour profiter au mieux de votre iPhone