So I've been tinkering with an older Gateway Windows XP machine to upgrade it, but when I turn it on, nothing happens. The fans spin up and everything, but it doesn't boot into Windows, the BIOS never shows up, AND my monitor doesn't know what do do with the signal! My monitor just shuts off when I plug it in! I'm particularly concerned with the Hard Drive. It makes no noise. Any help is... well... helpful!
Video of sounds it makes when booted: