拆卸定制台式电脑

Hello Person I'm Matri65 I'm new here and I come to ask everyone to help me solve my problem on my pc. I have a tower when I click on it I activate the screen time on my pc and when I'm reading a review the mode screen turns off automatically and I always have to put the code on so I can see it. so my screen stays on in a short time can someone help me Thanks