IBook G4 Right Speaker Noise

I recently started hearing a noise on my iBook G4(sporadically) coming from the right speaker. It soundslike a crumpling noise like crumpling paper sort of. I am not listening to any music and the noise happens whether the speakers are on or muted because when I heard the noise and the speakers where on I muted it and the noise continued. This usually happens after it has been running a while but I have also noticed it at startup after the computer has been turned off all night. Resetting the PMU seems to make it stop for a while but only for a day or so. Has anyone else had this problem or heard about it and if so what was the fix.
Additonally I only noticed this after upgrading to 10.4.6 but when I did a reformat to 10.4.4 it continued.
Thanks

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MBP 17" report, occasional white noise from right speaker

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2. When closed the screen appears to be slightly bent, the gap at the two front corners is about 1mm wider than the gap at the latches.
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4. I have now heard a white noise/static sound coming from the right speaker on 5 occasions. Three of those occasions were while booting (one of them was when I first turned the MBP on! Not a good sign). The computer boots normally, but with this strange noise! The other two times where when I was launching apps. On each occasion the noise lasted about 3-5 seconds before stopping. It's more of a hissing noise, not a mooing or a whining noise. It sounds exactly like the speakers on a vinyl record player when the needle is in between songs.
Obviously all of the issue are annoying. However I'm only REALLY concerned about item 4. Item 1 was kind of expected after doing some pre-purchase research. Item 2 is annoying in a £1800 laptop, but I can reluctantly live with it. Item 3 is frustrating but I'm sure I can 'cure' it by removing software (it only started happening after a day or two of fairly heavy use). Item 4, on the other hand, is intolerable
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Well, that was 15 minutes of life wasted typing out the above post that I'll never get back
I was hoping for some sort of 'expert' advice from all the users here with thousands of posts. Evidently not.
Anyway ... I have (kind of) fixed the problem myself. Resetting the power management unit almost completely solves the static noise problem. I say almost, because since resetting the PMU (about 2 weeks ago now) I have heard the static noise ONCE. This is compared to hearing it around 3 or 4 times a day prior to the PMU reset.
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Solved!
Go to Solution.
Attachments:
Audiograph_Erics version.vi ‏65 KB

Eric,
Yes, I intended to include an image. Sorry. Here it is.
Thanks for the subVI. With it I hear clicks most of the time except on some of the low amplitude outputs. Interestingly, at frequencies above 10 kHz where my hearing is poor, when I do hear something it is a non-pure sound with a dominant frequency lower than the generated frequency. I am not sure whether it is something in the sound system on my computer or in my ear/brain/mind acoustic analysis system. Here is what I get with my bad ears.
This is what the graph on Generate Sound-subVI shows when I hear the lower pitched sounds. Although the frequency is low enough that it is not aliased, I suspect that I am hearing the envelope rather than the underlying carrier.
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I tried that and it didnt seem to do much of anything.
I played part of a song on spotify and recorded it to perhaps give you an example of what it sounds like?
I covered the left speaker so most of what you hear is the right speaker alone. The distortion is pretty clear when audio comes out of that speaker.
Attachments:
example.zip ‏723 KB

My Right Speaker crackles... please help!!

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Please click the white star under my name to give me Kudos as a way to say "Thanks!"
Click the "Accept as Solution" button if I resolve your issue.

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Hi Liahona,
Welcome to Lenovo Community Forums!
I’m sorry to hear that there is buzzing noise generating from the right internal speaker and working as expected in the Headphone in your G505 Laptop, I suggest you to perform “System Restore” in the computer, below are the links to perform System restore in Windows 7 & Windows 8.
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