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Windows 7: Can auto-degauss be disabled via BIOS or s/w?


04 Dec 2010   #1

Windows 7 Ultimate x32 (UPDATE: Now x64!)
 
 
Can auto-degauss be disabled via BIOS or s/w?

[SOLVED...uhm, well, cleared my doubt anyway]



You see, I have an LG 700E CRT monitor and the auto-degauss noise at every start-up is very annoying. You know, the fizzing and the popping...

I checked in the monitor's settings but the 'Degauss' option (which I assume means Auto-Degauss) just says 'On'. I tried toggling it but the screen just degauss-es and the option still says 'On'

An alternative way to stop auto-degauss, which I found online, was to do something to the parts inside the monitor, which I am VERY reluctant to do.

So I was wondering if there was some BIOS setting or some software or anything of that sort which can help me circumvent this problem. My objective here is to stop 'auto' degauss, not disable the entire degauss feature...actually, stopping only the noise would be perfect but I know that's not possible...or is it?

Hoping for a quick reply,
T4


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04 Dec 2010   #2

Windows 7 Ultimate x86
 
 

The option in the menu is not to turn it of but rather to manually degauss (if needed)
In all CRT monitors I came across, Degaussing is hardwired with the on/off switch (in some models it goes only active after a certain time has passed since you switched it off like 20 mins or so)
But I'm with you...I'm not a trained tv tech so I would rather jump backwards through a hoop than taking my Weller to the insides of a CRT monitor or any old TV.

Well perhaps someone more knowledgeable in that field can give you better news, sorry

-DG
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04 Dec 2010   #3

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

The degauss is "hard wired", that is it does it's job at every power on. A thermister works as a timer of sorts. The degaussing coil is energized, and the thermistor heats up until it reaches a certain temperature, then it shuts off the relay to the degaussing coil.

The degaussing is an important thing as the CRT uses a deflection yoke, which is basically an electromagnet to deflect the electron beam to draw the picture on the face of the CRT. Since this is done electromagnetically, you must degauss the CRT to prevent "purity" issues caused by the magnetic field of the earth (no joke).

The earth is itself a big magnet. the North pole is actually the south pole of the magnet, and the South pole is the north pole of the magnet. Lines of magnetic flux flow between the poles, affected by the sun and the makeup of the earth itself.

If the CRT doesn't degauss, you will soon get colors in the corners, and eventually over the entire screen (think 60's flashback). You can see the same effect by moving a magnet (an unshielded speaker for instance) close to the CRT. Or if it is a large CRT, move it's orientation (turn it 90 degrees, etc).

PC CRT monitors also have a very fine pitched aperature, which can warp if not degaussed, causing incorrect beam landing (colors where they shouldn't be).

Long story short, let it degauss, it will only be for a moment, and it will save your CRT. It isn't something that can be turned off in most cases, as the manufacturer wouldn't want the CRT getting ruined prematurely. A Guy
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05 Dec 2010   #4

Windows 8.1 Pro (x64)
 
 

Get an LCD? Just saying...
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05 Dec 2010   #5
Microsoft MVP

Windows 8.1 Pro with Media Center 64 bit
 
 

You don't want to disable it. I have one that the degauss only works maybe once for every three times I turn on the monitor. When it doesn't work the CRT is unusable, the colors are way off and washed out. I have to turn it back off and on again and hope it works. This monitor will be going to the re-cycler in the very near future.
My System SpecsSystem Spec
07 Dec 2010   #6

Windows 7 Ultimate x32 (UPDATE: Now x64!)
 
 

Hmm, thanks to everyone for replying. I guess I'll just have to bear with it.

Oh btw, do LCDs need degaussing too?? If they do, do they make as much noise?
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07 Dec 2010   #7

Windows7 Pro 64bit SP-1; Windows XP Pro 32bit
 
 

My Samsung doesn't make any noise.

No picture tube on LED/LCD screens. No degaussing.

Mike
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10 Dec 2010   #8

Windows 7 Ultimate x32 (UPDATE: Now x64!)
 
 

Quote   Quote: Originally Posted by Hopalong X View Post
My Samsung doesn't make any noise.

No picture tube on LED/LCD screens. No degaussing.

Mike
Oh ok, cool.
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 Can auto-degauss be disabled via BIOS or s/w?




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