Our 2 year old laptop was working perfectly but on turning it on this evening all we get is the Lenovo screen. It will not boot up (Windows 10). I have tried removing batteries, pressing the F12 or F8 buttons as on previous threads but am getting nowhere. Any ideas please? It had to have a new power socket about a month ago as the hinge had cracked and the power socket had come apart. I can see it having to go back to the computer repair shop.....