I think my gpu is dead ?

Hello,

day before yesterday I was hovering over the internet when suddenly my screen went totally black and then when I tried to restart the computer all I got was a black screen ? after a lot of hit and trial I assumed that my OS has crashed,since then I have installed a fresh WIN 8.1 and everything was fine but without the graphics driver as soon as I installed the driver (amd catalyst ) in the process where the screen blinks and goes off,at that moment my screen didn’t came back to life any more,its happening with every version of Catalyst software,assuming that my GPU isn’t working anymore I switch back the cable to on-board graphics and everything works amazing.

I didn’t find the right solution from the Internet.

References

http://geek.digit.in/community/threads/i-think-my-gpu-is-dead.196305/

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