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Strange noise after closing system.

post #1 of 8
Thread Starter 
Hey all. I have a question about one thing. Because when i am turn off my computer from case i am hearing a strange noise. Sometimes yes sometimes not. But for the most cases i am hearing this.

I think that is from HDD. I am not sure.

On youtube i found similiar noise ( noise like grasshopper ? ), but that happens from HDD. But i have almost the same noise.

Second 0:25









I have a 1 disk, WD 1,5 TB


You think my disk is dying?
Edited by sew333 - 8/2/13 at 5:32am
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post #2 of 8
that might be the hard drive head moving into parking position (so that it won't accidentally touch the platters while moving the HD around).
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post #3 of 8
    Is the sound momentary as the power is shutting off, or is it continuous while your computer is off?

    Watching the video you linked:
  • 0:18–0:18: HDDs parking heads (the big click sounds).
  • 0:19–0:23: HDDs spinning down.
  • 0:24–0:25: Heads dragging across the stopping platter surfaces making "Eeewwt" sounds as the platters come to a stop.  You hear multiple instances of this sound as the multiple HDDs come to a stop at slightly different times.

    If you're referring to the momentary sounds through 0:24 – 0:25, this is perfectly normal.  Not all brands of HDDs make this sound when stopping, but it is perfectly normal for those that do.  Also, most HDDs don't remove the heads from the platter when they stop; they simply park the heads in a special "landing zone" near the spindle.  The faint screeching sound is the heads rubbing against the stopping platters as the air bearing gives way.
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post #4 of 8
also in some instances the motherboard speaker can give out a little blip at poweroff smile.gif
    
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post #5 of 8
Thread Starter 
Yes i mean that sound started at 0:24–0:25. Its normal? "Eeewwt"



And why sometimes computer turn off without that "Eeewwt" and sometimes with.


Sometimes are quiet sometimes not.
Edited by sew333 - 8/2/13 at 6:37am
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post #6 of 8
    The sound shouldn't be very loud at all (just as heard in the video), and in my experience it has always been somewhat consistent in volume.  The other possibility is that it's coming from the PSU (this could be quite a bit louder); but I'm only aware of some PSUs making that sound some 2–60 seconds after being unplugged from the wall.  If you're just shutting down the computer and not unplugging it from the wall (or turning of a power strip that it is connected to), it shouldn't be the PSU.

    Just to clarify: The sound is happening right as the computer switches off?  Try putting the computer to sleep (standby) and see if you hear the same sound.
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post #7 of 8
Thread Starter 
Its when i just CLOSE SYSTEM in Windows 7, and waiting when pc will shutdown. And after shutdown sometime i heard that "WheeeeeeP" from a case.
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post #8 of 8
That noise can be cause by the PSU. When you power off, it takes a moment or two for the PSU caps to discharge, and in the process, the power to the PWM starts to die. As this happens the frequency of the PWM ramps down from 25KHz-30KHz into the audible range in some PSU's giving the charateristic "chirp". Many switched mode PSUs do this, some louder than others. It's perfectly normal, and nothing to worry about. You can even try this with a laptop charger, listen closely as you ditch the power, and after a few seconds, you should hear the chirp.
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