humming noise [video]

[ts96]

I have a Dell Optiplex 740, AMD Athlon 64 X2 Dual Core Processor.

This loud humming is coming from inside the case, not sure what is going on?

It is constant. I had been able to trick into going off sometimes by putting it sleep and then immediately turning it back on. But that doesnt really work anymore.

http://s887.photobucket.com/user/ch...B-11062-00000EC911B543E4_zpsfed79719.mp4.html

 

[manofchalk]

Hmm, that sound almost like a motor rather than anything you would find in a computer. I almost think its the HDD, but if a HDD were making that kind of noise I doubt it would even work.

Best thing to do is open up the case and figure out what it is. Possible culprits are the HDD, PSU fan, CPU fan or any case fans you have. So either unplug them or play it by ear as to which one is responsible, then replace it.