I was using my laptop, til I decided to sleep when I woke up I turned on my laptop, it has power in it but the screen is black so I waited for 20 minutes, but nothing happened. So I research on how to fix it, I tried draining the inner battery and I also tried to remove the video card, memory, etc. as I follow the instruction in the internet, but nothing changed its still on black screen and have the power. I hope you can help me. THANK YOU!