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Question

Graphics card or Monitor is broken

Apr 19, 2017 4:59PM PDT

For the past month every time I play a Youtube video or any video full screen, red pixel boxes appear all over my screen. They continuously glitch out and then change color. Once I escape full screen the pixels disappear and my monitor is back to normal. I have a custom PC and my monitor is BenQ XL2420T and my graphics card is a GeForce GTX 680. I've gone through control panel and cleared any sketchy programs. I've gone through all the display settings and nothing is out of order. I also used a command to use the DirectX Diagnostic Tool which says that there is nothing wrong with the Graphics Card.

Discussion is locked

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Answer
DX diag is a poor test.
Apr 19, 2017 6:05PM PDT

Google this and re-test with this disabled.

"How to disable Flash Hardware Acceleration?"

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Answer
Trouble shoot
Apr 19, 2017 8:22PM PDT

Probably your card is acting up. If you can use another monitor and see if the same problem exists. Also, try to reinstall the driver for your graphics card, or check if there are new updates on its driver.