Lenovo THINKPAD L520 7860 Laptop Screen 15.6 LED BOTTOM LEFT WXGA HD

well friends today I'm talking about a blank screen issue of my laptop lenovo thinkpad i'm using when routing and I'm facing blank screen issue as you can see new key is working neither escape nor space or any other key as well as Control Alt Delete is also not working so I'll go step by step to tell you how you can recover your PC without any problem and as you can see that in case of a situation occurs like this turn off your computer and switch it off now you can see that my computer is off it's completely now I on it once again without the help of electricity and you can see the light but the screen is still black so the issue is not resolved I would like to open it and remove the battery so in case effects work better you give it a little time so it loses its charge and case if your system works I plug again and now you can see that I will on my laptop once again to see as it is th