T23 Brightness

Message

Way · #1 Post by **Way** » Sat Jun 25, 2005 6:57 pm

When I decrease the screen brightness using the fn key there is an audible buzzing from the display on all settings except maximium brightness.When I use the s3 graphics adapter software to decrease the brightness,there is no buzzing.My question is if I use the s3 method of controlling screen brightness,will it still decrease backlight power usage thus economizing on battery life?My thinkpad is still under warranty for a short while so if the buzzing is a fault I would like to take care of it.

#2 Post by **carbon_unit** » Sat Jun 25, 2005 10:00 pm

The buzzing sounds like a fault to me, None of my T23's do that.

Ted_E · #3 Post by **Ted_E** » Sun Jun 26, 2005 4:39 pm

Way wrote:When I decrease the screen brightness using the fn key there is an audible buzzing from the display on all settings except maximium brightness.When I use the s3 graphics adapter software to decrease the brightness,there is no buzzing.My question is if I use the s3 method of controlling screen brightness,will it still decrease backlight power usage thus economizing on battery life?My thinkpad is still under warranty for a short while so if the buzzing is a fault I would like to take care of it.

How loud? I never noticed it before reading your post but there is a very faint buzz from mine on all but the very dimest or brightest settings. If yours is audible at a couple feet in a quiet room, something is not right. (Unless you have exceptionally acute hearing)

Ted

nirvana0001 · #4 Post by **nirvana0001** » Mon Jun 27, 2005 3:33 am

mine doesn't has any sound. have you ask ibm what happen??

ambientscape · #5 Post by **ambientscape** » Mon Jun 27, 2005 9:45 am

Way wrote:When I decrease the screen brightness using the fn key there is an audible buzzing from the display on all settings except maximium brightness.When I use the s3 graphics adapter software to decrease the brightness,there is no buzzing.My question is if I use the s3 method of controlling screen brightness,will it still decrease backlight power usage thus economizing on battery life?My thinkpad is still under warranty for a short while so if the buzzing is a fault I would like to take care of it.

Seems that you are having the same problem like my T23. Mine had the buzzing sound whener I decreased the brightness.....the lower the brightness the louder the buzzing sound. When I set it to the brightess....it stop buzzing. It seems like the fault of the LCD or something...

Toe · #6 Post by **Toe** » Mon Jun 27, 2005 10:47 am

Just checked mine, the lower the settings...the louder the sound...I have to get close to hear it. But it's nothing major, and from 2-3 feet you can hardly notice it.

Maybe some part kicking in? Never noticed it before...

-Toe

BachManiac · #7 Post by **BachManiac** » Tue Jun 28, 2005 1:13 am

I have the same problem!

The buzzing part is the backlight inverter!

On full brightness, the backlight flashes normally, but if you decrease the brighness wwith the fn key, the inverter turns the backlight on and off in a high frequency and thats it, what we hear!

I've tested it on 3 different inverters from one T23 and two T22....

It looks like this buzzing is an effect of an getting old inverter...

My three tested inverters are not louder on lower brightness, but its only a different buzzing... its only heareable if its completely quiet, but then its making me nervous....

changing the brightness via S3 software works without buzzing? i have to test it!!

greetz

T23 Brightness

T23 Brightness

Re: T23 Brightness

Re: T23 Brightness

Who is online