When I boot my 360 up, sometimes it makes this terrible grinding sounds. It's consistent for a few seconds, stops and then starts back up, before eventually quitting just shortly after the dashboard loads. This is Xbox number 7 for me and I'm pretty damn strapped at the moment, so getting a new console is out of the question right now. I'm just wondering if there's anything I can do at home to resolve the problem. I'm assuming it's either my fan or my disc tray. I'm against sending it to MS, because I've heard horror stories about people not getting their consoles back for ages, or getting previously broken refurb consoles, which I'm not ok with. The area in which my console sits does get relatively dusty, so there's a good chance it may just need cleaned, so I could just "carefully" open it up and attempt to clean it, but idk if MS frowns upon that or not. And I'd REALLY hate to send it in now, with MW3 just 3 weeks away :(!
It's also worth noting that the issue doesn't happen every time I turn the console on. Maybe 1 in 4 startups.