It appears you have not yet registered with our community. To register please click here...

 
Go Back [M] > Madshrimps > WebNews
How to stop the whining noise of your LCD monitor How to stop the whining noise of your LCD monitor
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read


How to stop the whining noise of your LCD monitor
Reply
 
Thread Tools
Old 6th November 2008, 11:09   #1
Madshrimp
 
jmke's Avatar
 
Join Date: May 2002
Location: 7090/Belgium
Posts: 78,771
jmke has disabled reputation
Default How to stop the whining noise of your LCD monitor

Many computer users have run into the issue of whining LCD monitors. Usually, it does not occur when the monitor is set to full brightness, which is usually too bright for most users. The natural response is to turn the brightness down using the monitor's controls. That's when the monitor can start to emit some high frequency tones, which are described most often as buzzing or whining. The noise usually gets worse the more the screen is dimmed. The source of the problem appears to be components in the electronic circuit which controls the brightness of the CFL bulb that lights most LCD monitors. Most likely, this is some form of PWM (pulse width modulation) circuit, a very useful tool that, alas, can have negative side effects. For example, while it allows a fan to start reliably at unusually low speed, an improperly matched PWM control circuit can cause a DC fan to emit more clicking, buzzing and chattering noise as it is slowed. A similar effect may be happening with the monitor CFL bulbs. To modify this electronic circuit in order to reduce or eliminate the whining noise is an impossible challenge for most users. Thankfully, there is a simple workaround within the software controls bundled with most video card drivers
. The color adjustment screen in the display characteristics control panel also provides a brightness setting. Using this control reduces the brightness in the video card output. This bypasses the monitor's electronic control circuit, which can be left at maximum brightness, thus eliminating the noise.

http://www.silentpcreview.com/stop_lcd_whine
__________________
jmke is offline   Reply With Quote
Reply


Similar Threads
Thread Thread Starter Forum Replies Last Post
18.1" Eizo FlexScan L695 DVI 720p Rotating LCD Monitor w/ActiveShot Picture-in-Pictur jmke WebNews 1 4th February 2010 09:25
The Lagom LCD monitor test pages jmke WebNews 1 9th February 2009 17:12
Cheap design and noise monitor: Disappointment ACER AL2623W experience windwithme General Madness - System Building Advice 9 26th June 2007 18:29
IBM LCD monitor dead. LCD monitor madness revealed Sidney WebNews 0 10th June 2005 00:19
6" TFT LCD Monitor Review + Two NEW 6" LCD Mod Guides Sidney WebNews 0 6th November 2004 03:48

Thread Tools

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

vB 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 +1. The time now is 15:34.


Powered by vBulletin® - Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO