In the past two years I bought a 42" Samsung LCD television and a 24" HP computer monitor and experienced a buzzing sound emitting from both screens shortly after plugging them in for the first time.
The noise was a buzzing sound coming from the LCD display that was audible and nerve-wracking. I have to admit that I'm very noise-sensitive, and that it may not disturb you as much or at all if you are not that sensitive to noise in general.
My first thoughts were that the monitor must have a hardware defect, as it did not make sense, but once I started to investigate the issue and research it further, I discovered a working solution that eliminated the background noise that both LCD screens generated completely.
The noise was directly related to the brightness setting of both LCD monitors. Reducing the brightness of the monitor somehow generates the buzzing noise while a brightness level of 100 is the only level where it will not generate the sound.
I'm not a technician but I suspect that the noise is coming from the power supplies that power the small fluorescent tubes that are responsible for the backlight. Setting the brightness level to 100 eliminated the noise completely on both LCD displays. It was called Back Light and not brightness in the LCD television's options.
Setting the brightness to 100 resulted in a very bright computer monitor display which I was able to turn down by using the brightness settings of the video card.Turning down the brightness this way worked without issues, the annoying sound did not come back.
The LCD television provided two independent settings for brightness and backlight to adjust the display.
You can however use software applications, like those installed by video card drivers to change the brightness on the screen without affecting the sound level of it.
Other options include F.Lux, a free program that will dim the screen based on the time of the day, or Dim Screen, which is a portable application for Windows that changes the brightness in 10% intervals.Advertisement
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Ghacks is a technology news blog that was founded in 2005 by Martin Brinkmann. It has since then become one of the most popular tech news sites on the Internet with five authors and regular contributions from freelance writers.