high pitch noise in my laptop?

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guy2

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Apr 30, 2009
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I'm having this annoying noise that has just appeared suddenly, it's pretty new and iv never heard this before in this machine but iv heard noise like it from power supply's.

It sounds like a very high pitch electronic pulse very soft at times with no particular pattern and other times it starts exactly when i'm performing a task in my computer ,any task like moving to mouse or closing a window. ,

like something from a computer power supply when you short circuit or bunch up the wrong rails and it will make a high pitch FFFiiiiiisssss but not very loud.

I don't know what it is ,but id like some opinions on this suspicious noise before something fails.
 
Joined
Apr 16, 2010
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I wouldn't use it anymore until you get a new cord. You could do damage to your laptop.

Buying a new cord can be expensive, if paying $50-100 for a new one from the manufacturer is not a problem for you do that.

I'm in a similar sitiuation. You can get them cheaply enough off ebay if you find the same model (should be on the label with the exact amps and voltage) but you need to make sure the connector is the same as they use them with different laptops. Here is the tricky part, you'll need to measure the length of the connector, the diameter of the connector hole and the width of the connector tube. All in millimeters. If the connector matches up you can save money that way.
 

guy2

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Apr 30, 2009
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552
Well it so happens iv got lots of very accurate measuring tools around for metal working but i don't understand why i would need a new cord the sound is inside the computer.

Where did you get this information?
 

etaf

Wayne
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Oct 2, 2003
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it could be quite a few things , Fan, PSU, Harddrive
Try running just on battery , eliminate the charger circuity at least
 

etaf

Wayne
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AshleeD - did you mean to post here, your answer does not seem to match the question
 
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Apr 16, 2010
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When you said "Power supply" (which is the cord) I clearly misunderstood you guy2. Inside the computer is much worse :p.
 

guy2

Thread Starter
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Apr 30, 2009
Messages
552
I meant to post here


It's not the corded block transformer power supply it's from the inside ,i know there is another power supply in there somewhere or it couldn't run off battery. I know the really old laptop computers had 1 main power supply's built in ,there was no block transformer but this does for cooling id imagine. I know it's not the fan or hard drive because i think iv got those sound down buy now but the next time i hear it i will see what happens when i disconnect the AC.
 
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