Screen distorted in some resolutions

[Fed]

There should be other buttons, knobs, dials or menu settings that adjust the skew and all aspects of the picture. Play around with the menu, you'll get it. Remember to save the settings. You may need to do the same thing for each resolution you use.

Go back to your monitor controls, it's like herding cats but that seems like where your problem lies.

[BC_Programmer]

The Monitor does not support 1024x768 at all, or, more likely, it's starting to fail. One of the things a failing CRT will do is suddenly start looking goofy or wrong at higher resolutions that looked perfectly fine beforehand.