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Squealing noise - Computers & Internet

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  • robertcbyrd Mar 22, 2009

    I have a Lenovo 3000 n100 using Windows XP Home Edition SP2.

    I when the system powers up it gets to the Windows logo screen and starts a LOUD steady squealing noise. I removed the battery, same result, changed power supply, same result. Tried it on just batter, same result. I reseated the hard drive, same result.

    Any ideas?

  • Lee Hodgson
    Lee Hodgson May 11, 2010

    take the side panel off and please describe where the noise is coming from

  • Daniel Brooks May 11, 2010

    Please verify if this is caused by your PC fan(s).


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Posted on Nov 26, 2008

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Loud squealing in electronics is usually an indicator of faulty power somewhere or failed components. Often replacement is the best solution.

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It depends what you mean by noisy start. If it is a high-pitched squeal when you start (or accelerate quickly) it may be the alternator belt that is worn and needs replacing. The squeal of a worn alternator belt usually wears off after a few seconds because the belt has 'warmed'.

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Your fan is most likely in need of a cleaning, or straight out replacement. You can remove the retaining screws and pull the fan out as a complete unit and blow it out with a can of compressed air. If the noise is a high squealing sound, then I would purchase a replacement fan and install it. Fans can be purchased from Ebay, just remember to check and make sure that you are ordering the correct fan (case or heatsink) before you commit to buy.

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Super allwrite the writer


Ok so the problem is with dvdplayer not reading the discs right?

Load a disc and listen.Does the player make squealing noises or is it totally quiet? Squealing noises may indicate that the player is trying to synchronize with the disc but can't due to an obstruction on the lens or in the laser path inside the pickup or a defect in the pickup. This can also be caused by an intermittent signal problem due to a faulty ribbon cable.

Totally silent means that the photo sensor is not getting any usable input from the laser at all, meaning that the pickup is "blind" for lack of a better word.
This can be caused by an obstruction of the beam by foreign matter on the lens or inside the pickup all the way to a marginal or failed laser diode and/or photosensor array. This can also be caused by a bad ribbon cable with one or more severed traces.

You could try to clean the optics. This is the most common malfunction as far as i know in all disc players. It would involve taking the cover off and finding a way to expose the lense, and then cleaning it with a very gentle brush. some players have a cover for the lense that swings to the side during playing, this greatly reduces the chance of dust accumulating, but its still worth the try.

If you actually see dust on the lense, then its just that simple. clean, close, play.

It may also be worth your while to check on the small shafting that guides the carriage of the laser pickup. Dirt, grome, dust and solidified lubricant can cause stoppage of the carriage and the laser eye then fails to read the next track.

If the problem does not get solved then you have to get it repaired or replace your dvd player it is a defective one.

May 05, 2008 | Computers & Internet

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