View Full Version : Degauss question

01-22-2001, 07:28 PM
I have a Sony Trinitron Multiscan 17sf II that has developed mild a discoloraton in the lower right and left hand corners of the screen. I tried moving everything that might have a magnetic field away from the monitor but it made no difference. The only reference to degaussing in the manual says, "Trip the power switch to activate the Auto-degauss cycle." Wouldn't that mean the monitor would be degaussed every time you turned it on? Turning it on and off does nothing to the areas I described. Any suggestions or is there a new monitor in my future?

01-22-2001, 10:49 PM
Most newer monitors also have a manual way to to degauss; usually from an On Screen Display (OSD).

I have a new flat screen ViewSonic (aperture grill type with the fine wires right behind the screen) than automatically degausses everytime that it's waked up. It also has purity settings for each geographical area of the screen.

Check your OSD for all the choices you might have. If it won't degauss, service techs used to to it with a big magnet.

01-23-2001, 12:50 AM
I have the same monitor sitting right in front of me. There is no degauss because it degausses every time the monitor is turned on.. The other idea would be to hit the reset button at the left of the control buttons and then reset your settings. Other than that, I don't think that there is much hope except service or a nifty flat viewsonic (but I have to admit that I love my Sony!)

Let us know and good luck.


01-23-2001, 11:11 AM
you might want to try this nifty little trick. if you have an electric solder gun, i've used the big and small wellers, plug it in, click it on, and wave it in front of the screen. works like magic. the field it generates is opposite of most magnets (tools, etc.).

good luck


01-23-2001, 12:16 PM
Electric solder guns can degauss CRTs?

Sounds like they also fix color issues... weird. I guess they are magnetic.

01-24-2001, 02:14 PM
Trinitrons do degauss everytime they start up. If you hit the power button twice that will do it. It doesn't sound like a degaussing problem, though; degaussing is usually used to sharpen the image and realign the guns. A non-uniform persistant color problem is usually caused by 1) nearby fields, which you said you eliminated, and 2) age and fading.

I would recommend the Gurus overstock Sony 420GS monitors (http://www.macgurus.com/beta/showrampage.cgi?liquidations.html), one of which I'm looking at. They are extremely crisp, very flat, and can display up to 1600x1200 easily and still look good.

01-24-2001, 04:35 PM
dookie, where you BEEN!


01-25-2001, 11:30 AM
I think it is a field issue that is probably permanent. There was a speaker that was supposed to be shielded sitting right next to the monitor, exactly adjacent to the affected area. I know, dumb. It's not so much a discoloration - more like a haze. It's not severe at this point. Anyway, thanks for the tips. One more thing while we're on the subject, is there anything you can surround a monitor with to insulate it from magnetic fields?

01-25-2001, 08:39 PM
Yeah, a haze sounds like age and maybe a little bit of interference. If the monitor is more than five years old and has been on for at least 5-8 hours a day, it happens. How old is your monitor?

To address your interesting second question, yes, there are apparently a bunch of third-party manufacturers of external shielding products. Here (http://www.advancemag.com/) is one, with a great retro web page. Try searching for "monitor shielding" on Hotbot.

m, I've been trying to prepare for the trip back to Phoenix (i.e. partying my tail off and visiting friends at Goodfellow AFB). I leave here in three weeks. DSL is going to happen when I get back. http://macgurus.com/infopop/emoticons/icon_biggrin.gif

01-25-2001, 08:53 PM
Thanks for the tip. The monitor fits the profile. It's about 4-5 years old and has been getting heavy use particularly for the last 2 years. I'll check out the shielding but I suspect he damage has been done. The 20 & 21 inch monitors in the workplace have spoiled me so I better start saving.

01-26-2001, 05:36 PM
good, dookie. I have some phat disk images to send you.

your brother is working in the basement, now. Testing drives in a busted RAID 5. He's loving it. He's also getting pretty good.


01-26-2001, 06:25 PM

Will you actually pass the aircraft maintenance officers' course or will they break your saber after they cut the buttons off your blouse?

01-27-2001, 07:06 AM
what I want to know is, when does he get his zoomie hat with the propeller on the top?

01-27-2001, 07:08 PM
Yo, I already got one, but the new ones don't have propellers on 'em anymore, man, they have little low-bypass turbofans mounted backwards so that when we LTs have our heads in the wrong part of our anatomy we can execute a full-throttle pullout. http://macgurus.com/infopop/emoticons/icon_biggrin.gif

Also, Louie, they don't have a saber to give me. With the budget cuts, it's wrenches now. (Sabers are for ground-pounders anyway.) But they will probably hit me with it at some point. Yes, I will pass, in about three weeks, no less.

pixman: don't forget to check out the 19-inchers mentioned below. They are better than 20s in terms of footprint and heat, and they display the same amount. happy hunting!

01-28-2001, 01:26 AM
you could just get some of those little plastic sabers that they put in alcoholic fruit drinks.