Blurriness on 19" Princeton

Qion

Qion

Uber Nothing
I connect a 19" Princeton Graphic Systems monitor (CRT) to my eMac so that I can work on a larger canvas in Photoshop and Illustrator. I've been dealing with the annoyance of random "blurry" spots in the screen for a while now. They're just patches in the center, bottom left corner, and top of the screen that make things such as text or tools look blurry and hard to view. I've searched the web for fixes, but I haven't found anything viable yet.

Any ideas? I'm fairly sure it has nothing to do with Screen Spanning Doctor, my graphics card, or the adaptor I use, seeing that the monitor does the same thing on my G4 tower.

Thanks in advance.
 
When you say random do you mean they move around or are the blurry spots stationary (always in the same place)?
 
It could be that the screen needs degaussing. All modern TVs and monitors have automatic degaussing. It's a coil wrapped around the back of the screen which is energized for a short period when you power up.

Sometimes though it's not strong enough if for some reason the screen was exposed to a magnet or something similar. It used to be that a degaussing coil was part of every techies toolkit but they're not so common any longer.

You can rig one up, I have. You can take a spool of hook-up wire like you'll find at Radio Shack or any long length of wire you may have kicking around (the longer the better). If it's a long wire coil it around something like a large jar and tape it together so it stays in coil form. I take a 25W regular light bulb (close is OK) and put it in series with this coil to act as a resistor then plug the thing into the wall.

The wire coil will get warm but you don't want to leave it plugged in for long, a minute or so is enough for the job. Just move it around close to the screen areas where you've got the problems. You do this while the monitor is on. You'll see the effects as the colors go all whacky while the coil is near the screen.

Here's a site with a professional coil.

http://www.mainelectronics.com/degaussing.htm

Here's wikipedia with a description of degaussing.

http://en.wikipedia.org/wiki/Degaussing

You may be seeing a convergence problem but it sounds more like a job for degaussing to me.

My old skool TV repair skills are getting a workout lately. :)
 
And yet again I have to get off my ass to do something...

I'd rather not screw around with wiring. I haven't exactly had great experiences with electricity in the past.

Anyway, I think I'll try an even more ghetto approach (if such a thing is possible). I've noticed that when I turn on one monitor, it'll degauss the other ones within it's vicinity. Maybe if I had all of my monitors degauss at once around the Princeton, I would manage to get a headache, possibly a nosebleed, and a fixed monitor! :)

(I may have to just break down and buy a professional one; I wonder if Radio Shack sells them...)
 
simbalala said:
It could be that the screen needs degaussing. All modern TVs and monitors have automatic degaussing. It's a coil wrapped around the back of the screen which is energized for a short period when you power up.

Sometimes though it's not strong enough if for some reason the screen was exposed to a magnet or something similar. It used to be that a degaussing coil was part of every techies toolkit but they're not so common any longer.

You can rig one up, I have. You can take a spool of hook-up wire like you'll find at Radio Shack or any long length of wire you may have kicking around (the longer the better). If it's a long wire coil it around something like a large jar and tape it together so it stays in coil form. I take a 25W regular light bulb (close is OK) and put it in series with this coil to act as a resistor then plug the thing into the wall.

The wire coil will get warm but you don't want to leave it plugged in for long, a minute or so is enough for the job. Just move it around close to the screen areas where you've got the problems. You do this while the monitor is on. You'll see the effects as the colors go all whacky while the coil is near the screen.

Here's a site with a professional coil.

http://www.mainelectronics.com/degaussing.htm

Here's wikipedia with a description of degaussing.

http://en.wikipedia.org/wiki/Degaussing

You may be seeing a convergence problem but it sounds more like a job for degaussing to me.

My old skool TV repair skills are getting a workout lately. :)
Click to expand...

Before you do that, try looking in the menu of the monitor. Some of my CRT's had a degauss option on the menu.
 
eric2006 said:
Before you do that, try looking in the menu of the monitor. Some of my CRT's had a degauss option on the menu.
Click to expand...
Sometimes, for whatever reason, an accident or something, an area of the screen becomes affected to such an extent that the internal coil (which is way behind the front of the CRT) just can't do the job. That's why the manual degaussers exist.

One time I was showing one of my kids the effect of a magnet on a screen. The only way to get it back to normal was with a degaussing coil.
 
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