I have a Lenovo Y510P laptop that is about 2.5 years old. It has always been fine, though recently it has been getting slow. Suddenly today, there are read dots all over my screen, more or less arranged in vertical lines. It is not my monitor that is the problem, since the red pixels jitter around every time to screen is refreshed by anything. I was playing minecraft, and all was completely fine. When I closed the game, my desktop looked like this, and now everything looks like this.
I have read that this can either be due to a fried GPU, or a bad connection between the GPU and motherboard. I'm only reasking the question, because of muy special circumstance of having a laptop rather than a desktop, and have two graphics cards.
I don't think the connection could've come loose, because in the time that this issue appeared, the laptop hadn't moves at all. How can I investigate further? I'm going to try disabling each GPU one at a time, maybe disable them both if my motherboard has an integrated graphics chip. Restarts do absolutely nothing, so this is a hardware issue (obviously).
Edit: After trying to get to the NVIDIA control panel, I get a message:
NVIDIA Display settings are not available: You are not currently using a display attached to an NVIDIA GPU
Doesn't this mean that something had to have somehow gone wrong at the exact sae time with both of my GPU's?
Edit 2: One of my GPU's displays is disabled in the Device Manager. It gives an error "Code 43", which appears to simply mean that the device is disabled because it gave a message to the CPU indicating that it is not functioning properly.I've tried completely disabling one GPU at a time, then both together, and none of that has made any difference so far. Do I have to restart windows before disabling a device will take effect?