Lenovo G50-70 Laptop Display Not Working?

I have a Lenovo G50-70 laptop that is 6 months old. Last week I noticed that when I would re-boot my laptop the screen would not immediately come back on. It took a few minutes before the display would show even though I could hear the machine was on. A few days later I turned the laptop off to take it somewhere and when I tried to turn it on I heard the fan running and the lights on the front were on however the display would not come on. I then noticed that the screen was vaguely flashing a black screen. I left the laptop turned on and plugged in for five hours and the screen never turned on, it was just a constant flicker. I took the laptop back home and turned it on and still only a flickering black screen. I left it on and went to bed and when I woke up the screen was back on. It has done this to me twice now and it seems that after several hours the screen will come back on. The laptop is doing this again however it has been four days and the screen is still flickering black and will not turn on. Any ideas on what the problem is or what I can do? I do not have an external monitor I can use either.