When I restarted Windows, it showed up some formation on screen like that of a CD (round spiral lines)

I own a Toshiba M35X-S109 since last two years. It was working perfectly fine till yesterday when suddenly the screen started to flicker a little bit. After working for another half an hour, the screen started flickering more frequently and suddenly tuned blank. When I tried to restart it, it didn’t even go to the part where it shows up Toshiba on the screen. The screen just remained blue.
I took off the battery for a while and then I was able to restart it after around 10 minutes. But again after working for around 15 minutes the same thing happened and this time when I restarted Windows, it showed up some formation on screen like that of a CD( round spiral lines) on the left portion.
Kindly advice me what is wrong with my machine and what could be done to fix it.
I would really appreciate a reply from your side.

Not really sure what’s going on with the laptop, but I can suggest some troubleshooting steps. First of all, I would try to connect an external monitor and then start up the laptop. Now press on Fn key and press on F5 to select the video output mode. Make the laptop to display the video on both screens (internal screen and external monitor) at the same time. Now wait until it fails.
If the video fails only on the laptop screen and displays fine on the external monitor, then something is wrong in the display assembly. I would try to reseat the video cable on the system board and on the screen first, it might be just a loose connection. Check this website for laptop and display disassembly instructions. The second suspect would be the video cable. And finally the laptop screen itself.
If the video fails on both screens, then you might have more serious problem – a bad system board.