Not sure if this is the right place to post this in, but couldn't find any "help" sections.
So I made a new build for my friend, which arrived yesterday. He got one of his tech friends to install it for him. However, it seems there's a problem. The computer doesn't turn on. When hitting the power button, a green light on the motherboard turns on, but nothing else happens. I'm thinking to myself that it must be a faulty installation on his friends part and not the hardware's fault. Do you guys have any idea what's going on?