Re: buzzing and wont start up. Plz Help
Sounds like it might be a bad power supply. You can try unplugging all non-essential cards/peripherals as well as all memory sticks except for one (and try all sticks, but just one at a time) to see if you can boot. If you can boot, then start adding hardware one piece at a time until you find the item that causes the boot issue. But like I said, it's probably a power supply issue. Oh yeah, and you might want to try resetting the BIOS as a hail Mary.
But I'm trying, Ringo. I'm trying real hard... to be the Shepherd.