Minecraft Pixel Problem?

Play Minecraft and have recently had a graphics problem even without the texture pack
these lines because what can I do

See if that happens in another game too. If so, your GPU is on a. If not reinstall minecraft

- Look whether (especially with DVI connections) the cable is connected correctly.

-Try to restart the game.

-Make sure your graphics card is working properly.

-Download another texture pack in an emergency (you can also download it by default).

I can't help any more, sorry…

Okay thanks