I'm having a bit of an unusual issue. My 5650 seems to have completely disappeared. It doesn't show up under the device manager even when I set the BIOS (stock v 1.19) to use only the discrete card. I've tried every manner of driver installation I can find/think of, and the problem persists even when I use the never-altered factory hard drive instead of the SSD I put in immediately after unboxing. This makes me think it's a hardware issue and not a software issue. I've got a broken screen I'm dealing with, and today I was poking around with the Embedded Controller to achieve the "unsupported brightness" levels discussed here ( http://forum.notebookreview.com/acer/562576-acer-aspire-timelinex-3820tg-mods-tweaks-only.html ), relatively risk-free because I'm getting a new screen anyway. When I got no results, I read that there were different values set in the EC for the discrete and integrated graphics, so I went to switch to the 5650 to see what I could accomplish, when I first realized it was no longer there. My current theories are, either I did something in the EC which would cause the discrete graphics card to no longer function, or, whatever caused my screen to break (trauma or otherwise, I don't know) also caused my GPU to fail. The break is on the leftmost quarter of the screen, if that's relevant. Edit: Worth noting- When I set the BIOS to "DISCRETE", the display gets distorted/static-y from POST until Windows first loads. Any thoughts?