Dell XPS 420 PC Desktop "tighten blades" Questions

...sleep mode Maybe the fan is going bad.  Open the case and check it to make sure it is tight by tightening the screws.  Also make sure a cable or wire is not hitting the fan blades causing ...

...the power cable connection & condition of the fan - if dirty (clean it) or loose fan blade (tighten it) & if still it didn't work, I suggest to replace it with a new one. ...

...blades. you will have to open up the computer to see where the noise comes from. if it is a faulty fan, replace it sooner than later as it will get louder and louder. then stop making noise all ...

...with the bottom tang going down in the computer case, and then the 'door' is closed. (Screw tightened)[Note*Bottom tang going down into computer case.In reality the thin tang goes in-between ...

my dc7600,s fan makes noise when cpu usage reaches upto50 Open the case and try tightening the screws that hold the fan.  Also make sure no cable or wires are touching the fan blades causing the ...