If you want your PS2 to look its best on your 4K TV, there are a few things you can do. First, make sure you're using an HDMI cable to connect your PS2 to your TV. This will ensure that you're getting the best possible picture quality. Second, if your PS2 is upscaling the image to fit your 4K TV, it may not look as sharp as it could. To fix this, go into your PS2's settings and turn off upscaling. This will make the image appear more pixelated, but it will also be sharper. Finally, if you're still not happy with the way your PS2 looks on your 4K TV, consider investing in a HDCP converter. This will allow you to play HDCP-encrypted DVDs on your TV, which should improve the picture quality significantly.