Samsung NP355V5C - Graphics Card not working. rip?

Hi guys and girls. I have a big problem with my notebook(Samsung NP355V5C). Everything was completely fine until i left my laptop for 15 minutes(nothing was open, idle). When i came back the screen was black(not working) and i could only force a shutdown by pressing power button for 2s(i couldn't put laptop to sleep). When i restarted my notebook i noticed that my graphics card is not working, i can't play any games, etc.
Device Manager is showing this:




I can disable and enable that Radeon 7660 and device manager then says that card is working but it still really isn't:


So after that it looks like that:


Nothing is working. I can't even change screen brightness, can't re-install radeon drivers, can't open already installed drivers:


My graphics card was completely dead in that laptop one year ago, but i paid for a new motherboard and everything was fine until now.
I have hope that my graphics is not dead, but i think it is... How can i be sure?

 

Try doing a Windows restore to an earlier date when it was working. That will address the possibility that Windows (which version do you have?) has done a silent driver update which has broken the support for the AMD graphics.

John

 

I have tried that already, no result. Windows 10.

 

That would be bad luck if the GPU has died again.

Did you regularly heavily load the GPU? Any idea how hot it was getting?

John

 

I was only playing Sleeping Dogs recently(100% cpu usage most of the time) but i played that like 8h total, and the last time was 2 days before that problem. GPU temperature was something like max. 69-70C.

 

That temperature shouldn't hurt it.

I would normally suspect the driver because the AMD drivers have caused more than their fair share of aggrevation in this forum but you do have a precedent of a previous board replacement due to GPU problems. However, you seems to be unlucky because Google doesn't find many graphics problems with this notebook. Here's one unresolved report.

John