I was playing games on my PC as usual when suddenly the framerates dropped to like 2-3 FPS. I tried to close the game but it was very laggy and took a long while to do so. Immediately after I had closed the game, the PC seemed to run fine although a bit heavier than usual.

I tried another game and the same thing happened. Only this time, after loading a level, the game run normally for just a few seconds before the FPS started to drop again.

I tried to close the game like last time but the screen turned off and is now showing “Check Video Cable” and now I can’t control my PC.

Mouse and Keyboard are lighting up but num/caps/scroll lock lights don’t seem to turn off when I press their corresponding buttons, I had no choice but to plug off the cable.

I tried to fix this by opening the case and cleaning the dust inside with a hair blower. After that, the PC ran fine again for about a day or so, now it’s suddenly slow and the same thing happened again with the screen turning off.

What’s the issue and what do I do?