lcd monitor astigmatised? [SOLVED]

[wjgollatz]

[SOLVED]. Unfortunately, I do not have a lot of experience with the effects of VGA cabling. But that was the issue in this case. Changing the VGA cable setup, removed the lines, and the lines in the screenshots. Must be something about thin vertical lines that the VGA cable did not like, as when I zoomed in previously, the "astigmatism" would go away. I only got to it now because I had an emergency and had to leave my home for a bit.

Actually, the cabling from my new computer when to a VGA switch, and then a 2nd cable went from the switch to the monitor. The switch was there so that I could easily change inputs to a monitor between the computer and an Xbox. The switch worked fine, with the same cables in the same arrangement with a Win98 computer, a laptop output, through two different monitors.

That said, is the signal just weak from the HD4830 card?




=== ORIGINAL POST ======
http://home.comcast.net/~bjgollatz/default.htm

The above link goes to a 550kb screen shot of my monitor. I outlined in green, these "rippled" vertical lines that go in the direction to the right of some objects. That can appear in different colors, I do not see it at all in black, or white (or its effect is reduced).

Should this monitor be returned? It is a AOC 2019Vwal

I thought this was a result of a cheap integrated graphics card and dismissed it. I have installed a Radeon 4830 card with new graphics and it is the same. It occurs at the native resolution also. This screen shot is not at the native resolution, but the next highest.

 

[postmortemIA]

dude that is visible only on your screen. screenshot gives perfect picture. take a picture using digital camera.

 

[AmberClad]

I'm confused here...

You just posted a screenshot of your video output. That's not going to show us what you're seeing, when you view that screenshot on your monitor. (You need to use a camera and take a picture of your monitor)

Edit: postmortemIA beat me to it. Damn my slow typing .

 

[wjgollatz]

It is what I am seeing! The screenshot is perfect. I took the screen shot because the screenshot does match what I am seeing. But - as I can move the screenshot around and the "astigmatism" moves with it - it must be in the video output.

Ok - so -it is not the monitor, I guess it was a dumb question now in retrospect - so what the heck is it and why is it there? - it was never there on my CRT. It has spanned two different graphics chipsets. (The initial integrated graphics card, then this HD4830) I wouldn't think it was my CPU.

 

[wjgollatz]

Ok - I got a photograph up - its dark because I was having trouble gettign a decent shot because all sorts of lines would be wavy across the screen. Not sure how to get past that, except making sure shutter speed is faster than refresh rate.

 

[fatpat268]

Wow, I'm really confused now. The screenshot looks fine. From the picture of your monitor I can tell the image looks a little offset. You say you didn't have this problem till you had the LCD? Well, there's your answer, it's your LCD that's at fault.

 

[wjgollatz]

I was hand holding the camera and manually focusing it because I was using a prime lens and it was having auto focusing trouble at a close distance.

The screenshot it fine? In the green boxes - I easily see small vertical lines of color changes. I am guessing it was the monitor - but hoping it as not.

I do have Cleartype Tuning turned off.

========

Would using a VGA into a monitor with DVI and VGA inputs cause an issue like that and if I were to use DVI, there would not be an issue?

 

[CrystalBay]

I also see screendoor effect , something is not scaling properly..custom dpi ?

 

[wjgollatz]

No custom DPI.

It must be an issue with the VGA Output, either the card itself, the cable, or the monitor.

But - it still shows up in a screen shot.

Doe these cards have VGA problems? I will have to break out the vga monitor I stored and test it on that, and get a dvi card while going to the storage shed.

 

[wjgollatz]

When I zoom in on the screen shots, the lines go away. Printing does not show the screen shots. Is this something weird with the monitor then? Always showing some "astigmatism" for a particular image quality/content?

 

[postmortemIA]

are you on DVI or VGA?

 

[wjgollatz]

Using VGA right now.

It must be the monitor or the cabling. I sort of answered my problem in the first post and did not know it. I used the integrated graphics ship and had the problem, but thought it was an issue from a low end graphics controller, but with a new graphics card using different hardware, I am getting the same issue, so the computer and card are ruled out I would say.

 

[wjgollatz]

Originally posted by: CrystalBay
I also see screendoor effect , something is not scaling properly..custom dpi ?

Postmortem says he did not see anything. So maybe your monitor has a similar issue.

[SOLVED]. Unfortunately, I do not have a lot of experience with the effects of VGA cabling. But that was the issue in this case. Changing the VGA cable setup, removed the lines, and the lines in the screenshots. Must be something about thin vertical lines that the VGA cable did not like, as when I zoomed in previously, the "astigmatism" would go away. I only got to it now because I had an emergency and had to leave my home for a bit.

Actually, the cabling from my new computer when to a VGA switch, and then a 2nd cable went from the switch to the monitor. The switch was there so that I could easily change inputs to a monitor between the computer and an Xbox. The switch worked fine, with the same cables in the same arrangement with a Win98 computer, a laptop output, through two different monitors.

That said, is the signal just weak from the HD4830 card?