Help to solve a mistery

N

NeoDinox

New Member
Dear all,
I am new here.
I am searching an explanation for what is happanening on my monitor.

You can see in the image what I can see on it when it is off.

I deleted/cleaned the glass surface with all kind of cleaner, also spirit.
But after some days it appears again.

It seemes to be traced with a finger, but it is so geometricaly perfect that it would be impossible. Moreover nobody can access to my studio.

This symbol remember me something, but I cannot localise it.

Has somebody ever see something like this.

Many thanks.
Luigi
 

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Welcome to the forum!
What kind of monitor is that? LCD or CRT? That pattern is centered on the screen or its position is exactly where you draw it?
 
Lorand said:
Welcome to the forum!
What kind of monitor is that? LCD or CRT? That pattern is centered on the screen or its position is exactly where you draw it?
Click to expand...
Hi and thanks for your welcome.

It is a CRT monitor Acer 17 " G772 (BTW I also mailed the question to Acer and I'm waiting for some answer, if any. The pattern is similar to that in the figure, maybe larger.

It could have something to do with the smoke of my pipe, as it was attrracted by stati charge on the monitor surface. (?)

Thanks to all,
Luigi

p.s. my glasses are clean and I shown that to some friends :D :D
 
If that pattern were exactly in the center of the screen, then it could have some explanation. If the electron beam isn't cut-off at the moment of turning off the monitor, then for some time the whole dying-out beam is concentrated in a small spot in the center (just as it happened in very old tv-sets) because the deflecting coils are no longer powered. That concentrated charge could then attract small dust and smoke particles to that area.
So in this case it's a minor fault in the monitor's electronic circuit.
 
Lorand said:
Do you have some other equipment near the monitor (fan, speaker, etc.)?
Click to expand...

I already examined all contingent possible causes, but even if my little desktop is full of electornics, the problem is that nothing has changed in the last 2 years, when I bought the monitor, and this symbol appear only since a 3-4 months!

In the mean time Acer answered telling me to address/bring the device to... some 300 km from here to make a test :mad:

I know that this sounds a little "The Others" or "do not open the door", but I am really curious to discover the mistery!
 
Maybe it's not a mistery at all... Have you attached something to a monitor or accidentally bumping something in it? In that case the anti-static coating could have been damaged.
 
I still think that the beam isn't cut-off instantly at power off and that strange pattern is in fact the image of the electron gun. The spot where the electrons leave the electron gun looks like this:

electron-gun-4.jpg


The shape of it may vary, but it resembles quite well with that geometric figure...
 
actually it is not a ghost image. it is a real "finger on the wet window glass" like. It is external to the monitor, just on the surface and I can wipe it with a normal cleaner.

Yes Loran, it looks like a footprint of the gun projection, that maybe attract particles in a given shape.
 
LOL!! what's wrong with everyone here?! I know excactly what it is.. I've seen this very same thing in corn fields all around the world...


The truth is out there ;-).

ghost image. burned screen lol did you turn on screensaveer?
Click to expand...

I also thought of this but he said it goes away and then comes back.
 
Do you notice a difference when turning off the monitor if previously the image was all white or all black?
 
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