I’ve got a hp pavilion media center m8400f that was working fine until 2 days ago. When I went to turn it on yesterday it would start and turn off right away and the fan sounded really loud but I fixed it by unplugging and repluggin in the hard drives then it started up fine and worked all day. This morning I went to turn it on and only the green light on the front is lighting up and the power button isn’t, it’s on and the fan sounds really loud again and I’m not getting any picture. Can someone please help??