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Monitor jiggles


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DKTaber   (Don) DKTaber is offline
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02-Mar-2002, 12:08 PM #1
Monitor jiggles
I have a Mag Innovision 800V 19" monitor that is only about a year old. It's connected to an NVidia GeForce 256 video card with the latest drivers. The video on this machine (a Micron Millennia Max GS, PIII 733, Via chipset) has worked flawlessly since I bought it in 1999. Used it with an old 17" monitor for awhile, then bought the Mag.

Yesterday the picture suddenly started "jiggling"; quick little screen movements where it looks like the picture contracts laterally less than 1/2mm then expands back. Picture does not appear to move vertically; movement is only lateral.

I degaussed the monitor, but it didn't do anything. I hope this isn't the first sign the monitor is failing. What would cause something like this.

P.S. Nothing in my office has changed. It's not fluorescent lights or anything like that.
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02-Mar-2002, 12:22 PM #2
When you boot into Safe Mode, does it do the same thing? How about when you change modes (i.e. - from 16-bit to 256 colors)?
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02-Mar-2002, 02:27 PM #3
Jody: I don't know, but will try WHEN IT GOES BACK TO JIGGLING AGAIN! Would you believe that just after creating the thread, the screen became quiet...no jiggling. When it starts again, I will switch to safe mode, and see.

The fact that it seems to be on-again, off-again kind of suggests that is could be some kind of power line noise. There are a number of other things on my office circuit, like a small freezer... but I just checked and it's running as I'm writing this, so it's not that. The computer is not plugged into an APC (that "cleans up" the current); maybe it's time to invest in one.

Anyhow, if it starts again, I'll try safe mode.
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02-Mar-2002, 03:02 PM #4
Well, just after my last response, it started again, so I rebooted into safe mode. Yes, it does it in all modes; the bios logo was even jiggling (before ANY software is loaded).

So what does that mean?
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02-Mar-2002, 05:32 PM #5
It could be that the monitor is starting to go. It would be best if you could try it on a different computer somewhere to see if the problem follows the monitor. I have also seen problems like this caused by interference from other monitors, electric moters and fans. Any magnets (like speakers ) close to the monitor could cause this also.
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02-Mar-2002, 08:12 PM #6
My monitor displays the "jiggle" when coming out of sleep/standby mode after more than an hour...but, only then, and only for 3 or so seconds.... then it works fine. The other problem it has, are darker grayed out vertical bands, when first starting system...after first boot of day. I have replaced video drivers, a few days ago, this did nothing for either problem. And, using DirectX 8.1, all other things check out fine, so, I feel that this is an AGP or monitor problem.
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12-Mar-2002, 10:04 AM #7
Quote:
Originally posted by Lurker1
It could be that the monitor is starting to go. It would be best if you could try it on a different computer somewhere to see if the problem follows the monitor....
Lurker1: I tried the monitor on a friend's computer. Does the same thing, so it IS the monitor. Went to Mag InnoVision's web site. They say I have to ship it to them for repair AT MY COST and they ship it back. Some warranty! Their monitor is faulty, but it's going to cost ME a bundle to ship it (19" CRT's are HEAVY and BIG).

I also cannot live with a non-functioning computer for more than a day or so; I run a business on it. So I'm thinking about upgrading to a LCD flat panel, and selling the Mag when it comes back. I know nothing about LCD's except that their price seems to increase assymtotically as the size increases. I hear they're sharper, and some suggest you don't need as big a screen as with a CRT. However, I don't think I can go back to a 15", which is the size at which they're relatively inexpensive. The Mag's viewable area is 18". Seems to me I would not like anything less that a 17" LCD (you agree, disagree?). Who makes the best ones; who has the best prices; what do I need to look for before buying one; how reliable are they?
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12-Mar-2002, 11:14 AM #8
Jiggle wiggle....
Just a thought before you spend a lot of dosh...

Have you checked the moire control for your screen?

Moire corrects for an on-screen Video moiré pattern caused by interference between a well focused electron beam and the color phosphor stripes on the front of the screen.

Left and Right buttons are usually found for adjusting the amount of "beam wobble" to clear the moiré pattern. It may be your lateral moire control needs adjusting.

Its a long-shot, I know, but worth a check.

Mike
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12-Mar-2002, 12:24 PM #9
Here is a post which should help with your LCD questions
http://forums.techguy.org/showthread...ght=lcd+screen


Lcd screens are measured differently than regular CRTs so a 17" monitor may have the same viewing area as a 15" LCD.
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12-Mar-2002, 12:38 PM #10
Re: Jiggle wiggle....
Quote:
Originally posted by Mike C UK
Just a thought before you spend a lot of dosh...

Have you checked the moire control for your screen?

Moire corrects for an on-screen Video moiré pattern caused by interference between a well focused electron beam and the color phosphor stripes on the front of the screen.

Mike
Mike: Moire is not the problem. The image will suddenly and randomly shift 1/8" or so to the right, then back again. Also, the vertical parts of any fonts on the screen have deteriorated to jagged instead of smooth. E.g., the vertical part of an 'L' looks like it would make a good hacksaw! The moire on the monitor was set to 0 (both vertical and horizontal), so I just set both to 50 (out of 100). I don't see any difference in the image.

However, thanks for the response.
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