Go Back   Computer Forums > General Computing > Hardware
Join Computer forums Today

Thread Tools Search this Thread Display Modes
Old 11-28-2013, 10:05 AM   #1
Beta Member
Join Date: Nov 2013
Location: Espaņa
Posts: 3
Default Whistle on laptop's speakers

Hello, my friends.

I am experiencing a annoying whistle of more than 10kHz (don't know exactly, but very high-pitched) on the speakers of my laptop. It's very strange, and I will tell you why.

When I move the mouse it doesn't sound. When the mouse is stopped, it instantly becomes again audible.
Also when I reproduce anything in the computer, such as a mp3, with all the volume turned down, I can't heard that whistle. When I stop the mp3 player, it becomes again audible.

Another thing to have into account is that connecting the headphones doesn't make any difference, the whistle continues to happen from the speakers (when I plug in the headphones, it is supposed that the sound will only come to the headphones, but that doesn't happen with the whistle)

It is a very strange thing... hope you could help me, guys, to repair it. Is it from the sound card? It is external radiation? I don't really know

Thank you a lot

DrumSergio is offline   Reply With Quote
Old 11-28-2013, 10:16 AM   #2
Fully Optimized
ssc456's Avatar
Join Date: Jan 2007
Posts: 4,273
Send a message via MSN to ssc456
Default Re: Whistle on laptop's speakers

Does it only happen when the laptop is plugged into the mains? Does it happen on battery power? I've had this kind of issue before and it turned out to be a bit of a dodgy earth situation.

Try updating your sound card drivers.

He who has never failed has never attempted anything worth succeeding at.

Dont Eat Animals, Its Not Good For Them And They Dont Like It!
ssc456 is offline   Reply With Quote
Old 11-28-2013, 10:32 AM   #3
Beta Member
Join Date: Nov 2013
Location: Espaņa
Posts: 3
Default Re: Whistle on laptop's speakers

Thank you for answering.

It happens plugged in and also running with only battery. No difference. I've tried right now.

I updated the realtek drivers but there's no difference..

Thank you
DrumSergio is offline   Reply With Quote
Old 11-29-2013, 10:27 PM   #4
Wizard of Wires
setishock's Avatar
Join Date: Feb 2005
Location: Not sure
Posts: 10,031
Default Re: Whistle on laptop's speakers

You know that's just so odd. My desk monitor has developed a annoying little noise. Mine is the PWM module, for the LED back lighting, has slipped out of the factory calibration due to getting banged around when I moved.

In your case my not knowing brand name or age of the laptop, I'm going to make a general assumption.
It's the back light inverter. They make the most annoying whine if it's getting old or on it's way out. You don't hear it when you have your headset on because it's just blocking out the noise. It's not coming from the sound system.
Inside the inverter is a push/pull transistor setup, a transformer, and a filter capacitor. If the cap or the transformer (or both) develop a problem, you hear it whine. The 10Khz is about right. You sense it more than hear it. And it is nerve grating.

The fun part is getting the bezel off the front of the monitor panel to replace it and getting it back on. If it's under warranty send it back in to be serviced. If not a shop can handle it pretty quick.
Or you can do it yourself.
setishock is offline   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off

All times are GMT -5. The time now is 08:37 AM.

Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0