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powerbook hums
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Senior User
Join Date: Oct 2001
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Offline
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it sounds almost liek morse code but then humming sometimes neevr stops. it has nothign to do with the speakers because i muted them and it was still humming.
i noticed opening and closing an application causes skips in the humming sound.
any ideas what it is? it not too loud but its noticeable.
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Fresh-Faced Recruit
Join Date: Aug 2003
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Offline
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I think all albooks have that to some degree. changing the processor performance in energy saver will change loudness.
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Al 1.25
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Forum Regular
Join Date: Nov 2002
Location: Sitting in a Viennese Cafe and drinking my Melange.
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I noticed this zizzeling hum quite a while ago.
And in my case I just can hear it when the power supply is connected (i.e. when I'm sitting at the desk).
This morning I noticed that this hum came and went in sync with the cpu level meter on the display.
It's not loud and in a rather quiet office environment one barely would notice.
I wonder, what causes this noise - to me it sounds like a vibrating HF-coil under high load. ;-)
cheers, Michael.
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May 19th 2004: Switching Day! ( AlBook.G4/1,5GHz/768MB/80GB.5400rpm/128MB.VRAM/Superdrive/10.3.9 )
ok, that is history! :-)
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Forum Regular
Join Date: Nov 2002
Location: Sitting in a Viennese Cafe and drinking my Melange.
Status:
Offline
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Right now something funny happend:
I'm sitting here in my dead quiet flat and the PoBo is pretty silent. Ok, I hear the disk etc. but it's all whispering.
I had Finder open and was browsing through the files on the desktop in order to clean it up.
So this little preview window on the right side changed depending on what file that was.
As I was stepping down the files suddenly this zizzeling hum appeared.
It was a MPG-file and this tiny noise was there when Quicktime preview showed up.
It was gone when a JPG or other stuff was showed.
I don't have an explanation by now - maybe a driver thing which brings the system into a certain condition or such.
Whatever, just what I noticed - :-) Michael.
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May 19th 2004: Switching Day! ( AlBook.G4/1,5GHz/768MB/80GB.5400rpm/128MB.VRAM/Superdrive/10.3.9 )
ok, that is history! :-)
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Fresh-Faced Recruit
Join Date: Aug 2003
Status:
Offline
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"And in my case I just can hear it when the power supply is connected"
this may be because when the power is connected, your energysaver is set to highest processor performance. when on battery - automatic.
The much louder "morse code sound" happenswhen the finder preview window is open and a file with sound is selected.
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Al 1.25
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Forum Regular
Join Date: Nov 2002
Location: Sitting in a Viennese Cafe and drinking my Melange.
Status:
Offline
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You're right! I crosschecked by setting the performance to highest when running on battery. Then it hums too.
Odd thing though ...
cheers, Michael.
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May 19th 2004: Switching Day! ( AlBook.G4/1,5GHz/768MB/80GB.5400rpm/128MB.VRAM/Superdrive/10.3.9 )
ok, that is history! :-)
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